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Community Medicine & Public Health - Diabetes Mellitus MCQs

Total questions: 80

Worksheet time: 40mins

Name
Class
Date
1.

A 45-year-old male with a BMI of 32 kg/m^2 and a strong family history of type 2 diabetes has a fasting plasma glucose of 115 mg/dL and a 2-hour post-glucose load value of 185 mg/dL. According to WHO criteria, how should this patient be classified?

a)

Normal Glucose Tolerance

b)

Impaired Fasting Glucose (IFG)

c)

Impaired Glucose Tolerance (IGT)

d)

Diabetes Mellitus

2.

A public health team is planning a screening program for Type 2 Diabetes in a community known for high obesity rates. Which test is the most cost-effective and practical single-step screening tool for this population?

a)

Glycosylated Hemoglobin (HbA1c)

b)

75g Oral Glucose Tolerance Test (OGTT)

c)

Fasting Plasma Glucose (FPG)

d)

Random Plasma Glucose (RPG)

3.

A 52-year-old woman is newly diagnosed with Type 2 Diabetes. The community health nurse counsels her on the best approach to primary prevention for her 16-year-old daughter. Which recommendation is most appropriate?

a)

Annual screening with FPG starting at age 20

b)

Weight management and 150 minutes of moderate exercise weekly

c)

Initiating Metformin to reduce insulin resistance

d)

Educating the daughter on the signs of hyperglycemia and ketoacidosis

4.

A diabetic patient is being managed to prevent foot ulcers and nephropathy. This intervention, aimed at limiting the progression and complications of an established disease, is an example of which level of prevention?

a)

Primordial

b)

Primary

c)

Secondary

d)

Tertiary

5.

In a low-resource setting, which one of the following is the most significant modifiable risk factor contributing to the global burden (epidemiology) of Type 2 Diabetes?

a)

Genetic predisposition

b)

Increasing age

c)

Physical inactivity and unhealthy diet

d)

History of gestational diabetes

6.

A 38-year-old man reports persistent thirst and unexplained weight loss. His random plasma glucose is 215 mg/dL. To confirm the diagnosis of Diabetes Mellitus, which value from a separate test would meet the WHO diagnostic criteria?

a)

A fasting plasma glucose of 110 mg/dL

b)

An HbA1c of 6.0%

c)

A 2-hour OGTT value of 190 mg/dL

d)

A fasting plasma glucose of 130 mg/dL

7.

Which of the following describes the most common worldwide pattern (epidemiology) of Diabetes Mellitus?

a)

Type 1 diabetes is more prevalent than Type 2 diabetes.

b)

The prevalence is decreasing in developed nations due to better screening.

c)

The majority of people with diabetes live in low- and middle-income countries.

d)

It primarily affects the elderly population (over 70 years old).

8.

A community initiative involves adding a low-calorie sweetener to all school-provided beverages to reduce the overall population's sugar intake, before any individual develops diabetes. This is an example of which level of prevention?

a)

Primordial

b)

Primary

c)

Secondary

d)

Tertiary

9.

Which of the following is an established WHO diagnostic criterion for Diabetes Mellitus based on a single measurement in the presence of classic symptoms (polyuria, polydipsia, unexplained weight loss)?

a)

Fasting Plasma Glucose ≥100 mg/dL

b)

HbA1c ≥6.0%

c)

Random Plasma Glucose ≥200 mg/dL

d)

2-hour OGTT Plasma Glucose ≥140 mg/dL

10.

A 55-year-old diabetic patient is receiving education on self-monitoring blood glucose (SMBG) to adjust insulin doses and prevent severe hypo- or hyperglycemia. This is an example of:

a)

Primary prevention

b)

Secondary prevention

c)

Tertiary prevention

d)

Primordial prevention

11.

A child presents with intellectual disability, a characteristic facial appearance (epicanthal folds, flat nasal bridge), and a single palmar crease. The condition is most likely due to an extra copy of chromosome 21. This is classified as which type of genetic disorder?

a)

Single-gene disorder

b)

Mitochondrial disorder

c)

Chromosomal abnormality

d)

Multifactorial disorder

12.

A couple has one child with a confirmed autosomal recessive disorder (e.g., Cystic Fibrosis). They are planning another pregnancy. What is the most common and effective preventive strategy they can employ?

a)

Routine ultrasound monitoring during pregnancy

b)

Carrier screening for both parents before conception

c)

Folic acid supplementation

d)

Adoption to avoid passing on the gene

13.

A 35-year-old woman is pregnant. Her maternal serum alpha-fetoprotein (MSAFP) is elevated. This triggers further investigation for a neural tube defect. This specific maternal blood test is an example of which type of genetic program?

a)

Population-based primary prevention

b)

Carrier screening

c)

Prenatal screening

d)

Neonatal screening

14.

Which of the following is an example of a multifactorial genetic disorder?

a)

Huntington's disease (Autosomal dominant)

b)

Phenylketonuria (PKU) (Autosomal recessive)

c)

Down syndrome (Chromosomal)

d)

Type 2 Diabetes Mellitus (Genetic and environmental factors)

15.

The routine testing of all newborns for Phenylketonuria (PKU) in the first week of life, allowing for early dietary intervention to prevent intellectual disability, is a classic example of a:

a)

Primary prevention program

b)

Neonatal screening program

c)

Carrier screening program

d)

Preimplantation genetic diagnosis

16.

A pedigree analysis shows a trait that appears in every generation. Affected fathers pass the trait to all their daughters, but none of their sons. This inheritance pattern is consistent with:

a)

A. Autosomal Dominant

b)

B. Autosomal Recessive

c)

C. X-linked Dominant

d)

D. X-linked Recessive

17.

A patient presents with Marfan syndrome, a disorder affecting connective tissue due to a mutation in the FBN1 gene. The patient’s father also has the condition. If the patient has a child, there is a 50% chance of transmission to the offspring. This is characteristic of which genetic disorder type?

a)

A. Autosomal Recessive

b)

B. X-linked Recessive

c)

C. Autosomal Dominant

d)

D. Chromosomal Abnormality

18.

A young adult with a known family history of Lynch Syndrome (Hereditary Non-Polyposis Colorectal Cancer) is advised to undergo regular colonoscopies starting at a young age. This strategy is a form of:

a)

Gene therapy

b)

Predictive/Pre-symptomatic screening

c)

Carrier screening

d)

Neonatal screening

19.

Which of the following is the best example of primary prevention in the context of genetics?

a)

Screening for Sickle Cell Trait in high-risk populations

b)

Early dietary restriction for infants diagnosed with PKU

c)

Counseling a couple with a known genetic risk to consider in-vitro fertilization with PGD

d)

Advising pregnant women to take Folic Acid supplements to prevent neural tube defects.

20.

A 2-year-old boy presents with progressive muscle weakness and is later diagnosed with Duchenne Muscular Dystrophy (DMD). His mother is clinically unaffected. This is characteristic of a disorder inherited in which pattern?

a)

A. Autosomal Dominant

b)

B. Autosomal Recessive

c)

C. X-linked Dominant

d)

D. X-linked Recessive

21.

A 28-year-old woman presents to a community clinic with a history of three consecutive spontaneous abortions. This condition primarily relates to which component of reproductive health?

a)

Safe motherhood

b)

Prevention of unsafe abortion

c)

Prevention and management of infertility and reproductive tract infections

d)

Promoting responsible and safe sexuality

22.

Which of the following statistics is the most direct and sensitive measure of the quality of obstetric care in a given population?

a)

Crude Birth Rate

b)

General Fertility Rate

c)

Maternal Mortality Ratio (MMR)

d)

Total Fertility Rate (TFR)

23.

A public health program focuses on increasing the age of marriage, promoting female literacy, and providing access to family planning services. These measures are primarily aimed at reducing which epidemiological statistic?

a)

Infant Mortality Rate

b)

Neonatal Mortality Rate

c)

Total Fertility Rate (TFR)

d)

Sex Ratio

24.

A community initiative is providing cervical cancer screening (Pap smears) to women aged 25-60. This falls under which category of women's health and life-cycle care?

a)

Care during adolescence

b)

Care during the reproductive years (mid-life)

c)

Care during pre-conception

d)

Care during the post-menopausal years

25.

"Safe Motherhood" is a critical component of Reproductive Health. Which of the following interventions is the most effective single strategy for reducing maternal deaths globally?

a)

Providing universal access to iron and folic acid tablets

b)

Increasing the

26.

Which of the following age groups is covered by the term "Adolescent Health" in the context of the female life-cycle?

a)

10 to 19 years

b)

15 to 24 years

c)

18 to 30 years

d)

12 to 25 years

27.

A public health worker is conducting a survey. She asks a woman how many live children she has had and how many of those children died before reaching their first birthday. The data collected will directly contribute to calculating which important epidemiological statistic?

a)

Neonatal Mortality Rate

b)

Child Mortality Rate

c)

Infant Mortality Rate

d)

Perinatal Mortality Rate

28.

A country has a high Neonatal Mortality Rate (NMR). The vast majority of these deaths occur in the first 7 days of life. Which one of the following is the most critical intervention to address these early neonatal deaths?

a)

Promoting childhood immunization

b)

Improving post-natal nutrition for the mother

c)

Antenatal care and improved care around the time of birth (intrapartum care)

d)

Treating childhood infectious diseases

29.

The WHO defines a set of interlinked health issues, focusing on the well-being of the whole person, not just the absence of disease, in matters relating to the reproductive system. This refers to the concept of:

a)

Women's Health

b)

Family Planning

c)

Safe Motherhood

d)

Reproductive Health

30.

Which of the following is a key focus of male reproductive health components?

a)

Screening for post-menopausal osteoporosis

b)

Prevention and management of sexually transmitted infections (STIs)

c)

Reduction of maternal mortality

d)

Promoting exclusive breastfeeding

31.

A 30-year-old man from a conservative cultural background avoids seeking treatment for premature ejaculation because he believes it is a sign of personal weakness and shame. This is an example of a major:

a)

Sexual dysfunction

b)

Ethical consideration

c)

Cultural syndrome

d)

Barrier to care

32.

A patient presents with a persistent and recurrent inability to attain or maintain an adequate lubrication-swelling response during sexual activity, causing significant distress. This is classified as which type of sexual dysfunction?

a)

Sexual pain disorder

b)

Sexual interest/arousal disorder

c)

Orgasmic disorder

d)

Gender dysphoria

33.

A 40-year-old woman describes a chronic, burning vulvar pain that is worse during intercourse (dyspareunia) and has no apparent organic cause. Her symptoms lead to significant relationship stress and anxiety. From a behavioral science perspective, this is an example of:

a)

Sexual aversion disorder

b)

Sexual pain dysfunction

c)

Cultural syndrome (e.g., Koro)

d)

Ethical consideration regarding confidentiality

34.

An ethical committee is debating whether to inform the sexual partner of a patient who has been diagnosed with a highly contagious, chronic sexually transmitted infection, despite the patient's refusal to disclose. This scenario primarily relates to the ethical consideration of:

a)

A. Autonomy vs. Beneficence

b)

B. Non-maleficence vs. Justice

c)

C. Confidentiality vs. Duty to warn

d)

D. Informed consent vs. Paternalism

35.

A young man in an East Asian country presents with an intense, culture-bound fear that his penis is shrinking and will retract into his abdomen, which he believes will cause death. This condition is best categorized as a:

a)

Sexual dysfunction (Performance anxiety)

b)

Cultural syndrome (Koro)

c)

Barrier to care (Stigma)

d)

Ethical dilemma

36.

A 55-year-old post-menopausal woman has lost 2 inches of height over the last 5 years and complains of back pain. A DEXA scan confirms osteoporosis. This is primarily a result of the decline in which hormone following menopause?

a)

Progesterone

b)

Follicle-Stimulating Hormone (FSH)

c)

Estrogen

d)

Luteinizing Hormone (LH)

37.

A 51-year-old woman, who has not had a menstrual period for 14 months, reports increased frequency of urination, urgency, and painful intercourse (dyspareunia). These symptoms are best explained by:

a)

The natural aging process of the bladder

b)

Post-menopausal atrophic changes in the genitourinary system

c)

Ovarian cancer

d)

Hyperprolactinemia

38.

Which of the following post-menopausal changes carries the most significant risk for long-term cardiovascular morbidity and mortality in women?

a)

Decreased skin elasticity and collagen loss

b)

Central redistribution of body fat (increased abdominal fat)

c)

Vasomotor symptoms (hot flashes)

d)

Increased LDL-cholesterol and decreased HDL-cholesterol levels

39.

A 58-year-old woman complains of new-onset mood swings, irritability, and difficulty concentrating. Although various factors contribute to these cognitive/mood symptoms, they are most directly linked to the post-menopausal decrease in:

a)

Serotonin levels

b)

Androgen (Testosterone) levels

c)

Estrogen levels

d)

Thyroid hormone levels

40.

Which change in the hypothalamic-pituitary-ovarian axis is characteristic of the post-menopausal state?

a)

Decreased levels of FSH and LH due to negative feedback

b)

Increased levels of FSH and LH due to the loss of negative feedback from inhibin and estrogen

c)

Increased production of progesterone by the adrenal glands

d)

Complete cessation of all ovarian steroid production

41.

A patient with Cushing's Syndrome due to an adrenal tumor has very high cortisol levels. Cortisol, a steroid hormone, exerts its effect by binding to a receptor located where within the target cell?

a)

Cell membrane (G-protein coupled)

b)

Cytosol and Nucleus

c)

Endoplasmic Reticulum

d)

Mitochondria

42.

Which of the following chemical messengers is classified as a peptide hormone and acts primarily via an external cell surface receptor to exert its effect?

a)

Thyroxine (T4)

b)

Cortisol

c)

Epinephrine

d)

Insulin

43.

A patient is diagnosed with Graves' disease, an autoimmune condition where an antibody stimulates the Thyroid-Stimulating Hormone (TSH) receptor. This TSH receptor is an example of which type of cell-surface receptor?

a)

Ligand-gated ion channel

b)

Enzyme-linked receptor (Tyrosine Kinase)

c)

G-protein coupled receptor (GPCR)

d)

Nuclear receptor

44.

The release of Parathyroid Hormone (PTH) in response to falling plasma calcium levels is a classic example of which type of homeostatic control?

a)

Positive feedback loop

b)

Negative feedback loop (Simple endocrine axis)

c)

Neural control

d)

Feed-forward mechanism

45.

Which hormone is derived from the amino acid tyrosine and acts by binding to an intracellular receptor, leading to changes in gene expression?

a)

Glucagon (Peptide)

b)

Aldosterone (Steroid)

c)

Thyroxine (T4) (Amino acid derivative)

d)

Vasopressin (Peptide)

46.

In the regulation of the Hypothalamic-Pituitary-Adrenal (HPA) axis, high levels of circulating cortisol inhibit the secretion of CRH from the hypothalamus and ACTH from the pituitary gland. This mechanism is known as:

a)

Autoregulation

b)

Ultra-short loop feedback

c)

Long loop negative feedback

d)

Positive feedback

47.

Which class of hormones are synthesized from cholesterol and include hormones like testosterone, estrogen, and cortisol?

a)

A. Amino Acid Derivatives

b)

B. Peptide Hormones

c)

C. Eicosanoids

d)

D. Steroid Hormones

48.

A hormone is secreted in a pulsatile manner, maintaining relative stability in its blood concentration. Its primary action is to bind a transmembrane receptor. If the target cell is continually exposed to very high levels of this hormone, the number of its receptors will likely decrease. This phenomenon is termed:

a)

Up-regulation

b)

Down-regulation

c)

Receptor affinity modulation

d)

Receptor saturation

49.

Which of the following represents a hormone that acts primarily through a nuclear receptor?

a)

Glucagon

b)

Growth Hormone

c)

Insulin

d)

Vitamin D (A steroid-like prohormone)

50.

The receptor for TSH is a member of the G-protein coupled receptor (GPCR) family. The binding of TSH to its receptor ultimately leads to the intracellular activation of:

a)

Guanylate cyclase

b)

Adenylate cyclase

c)

Tyrosine kinase

d)

Phospholipase C

51.

The hormone Glucagon binds to a cell-surface receptor and activates the Gs protein. This results in the production of the second messenger that activates Protein Kinase A (PKA). What is this second messenger?

a)

IP3 (Inositol Triphosphate)

b)

cAMP (Cyclic Adenosine Monophosphate)

c)

DAG (Diacylglycerol)

d)

cGMP (Cyclic Guanosine Monophosphate)

52.

cGMP acts as a second messenger in the mechanism of action for which chemical messenger/signal?

a)

Epinephrine (acting on β-receptors)

b)

Insulin

c)

Nitric Oxide (NO)

d)

Glucagon

53.

A patient with Type 2 Diabetes has decreased sensitivity to Insulin. The Insulin receptor is an example of a receptor with intrinsic enzyme activity, specifically:

a)

Guanylate Cyclase activity

b)

Serine/Threonine Kinase activity

c)

Tyrosine Kinase activity

d)

Histidine Kinase activity

54.

The hormone Prolactin binds to its receptor on a mammary gland cell. This binding causes the receptor to dimerize and recruit and activate a cytoplasmic enzyme, which then phosphorylates transcription factors. This mechanism is characteristic of the:

a)

cAMP pathway

b)

IP3/DAG pathway

c)

JAK-STAT pathway

d)

Tyrosine Kinase pathway (Intrinsic)

55.

Calmodulin is a ubiquitous calcium-binding protein that, when bound to Ca2+, undergoes a conformational change and regulates the activity of numerous enzymes. Calmodulin is primarily a component of the signaling pathway involving:

a)

cAMP

b)

Steroid hormones

c)

Calcium-Calmodulin

d)

JAK-STAT

56.

Which of the following receptors, upon activation, directly translocates to the nucleus to act as a ligand-activated transcription factor?

a)

Epidermal Growth Factor (EGF) receptor

b)

TSH receptor

c)

Thyroid Hormone receptor

d)

JAK-STAT receptor

57.

In the IP /DAG signaling pathway, the action of IP3 is to:

a)

Activate Protein Kinase C (PKC)

b)

Hydrolyze GTP to GDP

c)

Open calcium channels on the Endoplasmic Reticulum

d)

Directly phosphorylate key metabolic enzymes

58.

The JAK-STAT pathway is commonly used by many cytokines and certain hormones like growth hormone. The JAK enzyme acts by:

a)

Cleaving the STAT protein to activate it

b)

Dephosphorylating the receptor to terminate the signal

c)

Recruiting a G-protein to the receptor complex

d)

Phosphorylating the receptor and then the STAT protein

59.

The primary function of the second messenger DAG (Diacylglycerol), generated from the hydrolysis of PIP2 is to:

a)

Increase intracellular Ca2+ concentration

b)

Bind to and activate Protein Kinase C (PKC)

c)

Activate the JAK kinase

d)

Open membrane ion channels

60.

A cell has a receptor with intrinsic Tyrosine Kinase activity. The ultimate effect of ligand binding to this receptor is often a change in:

a)

Ion flux across the membrane

b)

Hydrolysis of ATP to cAMP

c)

Gene transcription and cell proliferation/differentiation

d)

cGMP hydrolysis

61.

A cross between two heterozygous parents (Aa×Aa) results in offspring. What is the expected ratio of the phenotypes if the trait follows simple Mendelian inheritance with complete dominance?

a)

1:2:1

b)

3:1

c)

9:3:3:1

d)

1:1

62.

A geneticist is drawing a family tree where a square represents a male, a circle represents a female, and a shaded symbol represents an affected individual. This graphical representation is called:

a)

Karyotype

b)

Pedigree analysis

c)

Blotting technique

d)

Chromosomal map

63.

The observable physical or biochemical characteristics of an organism, as determined by both genetic makeup and environmental influences, is referred to as the:

a)

Genotype

b)

Locus

c)

Allele

d)

Phenotype

64.

A male patient presents with 47, XXY karyotype, leading to tall stature, small testes, and gynecomastia. This is the most common cause of male primary hypogonadism and is an example of a:

a)

Aneuploidy (Sex Chromosome Abnormality)

b)

Autosomal Deletion

c)

Autosomal Translocation

d)

Single-gene disorder

65.

The fundamental unit of heredity; a segment of DNA that codes for a specific functional product (protein or RNA) is called a(n):

a)

Chromosome

b)

Allele

c)

Gene

d)

Codon

66.

In Mendelian inheritance, a disorder that appears in all generations and is transmitted from an affected parent to, on average, 50% of the offspring, regardless of sex, is most likely:

a)

Autosomal Recessive

b)

Autosomal Dominant

c)

X-linked Recessive

d)

Mitochondrial

67.

The location of a specific gene on a chromosome is referred to as its:

a)

Allele

b)

Genome

c)

Locus

d)

Pedigree

68.

During DNA replication in a bacterial cell (prokaryotic), which enzyme is responsible for synthesizing the short RNA primers needed to start the process on both the leading and lagging strands?

a)

DNA Polymerase I

b)

DNA Ligase

c)

DNA Gyrase

d)

Primase

69.

Which process occurs in the nucleus of a eukaryotic cell and involves the synthesis of an mRNA molecule from a DNA template?

a)

Translation

b)

Replication

c)

Transcription

d)

Reverse Transcription

70.

The lac operon in E. coli is a classic example of gene regulation. When both lactose is present and glucose is absent, the operon is maximally activated. In this state:

a)

The repressor is bound to the operator, and cAMP-CAP is bound to the promoter.

b)

The repressor is NOT bound to the operator, and cAMP-CAP is bound to the promoter.

c)

The repressor is NOT bound to the operator, and cAMP-CAP is NOT bound to the promoter.

d)

The repressor is bound, and cAMP-CAP is NOT bound.

71.

In the process of translation (protein synthesis), the peptide bond between amino acids is formed by the catalytic activity residing in which component of the ribosome?

a)

Small subunit rRNA

b)

Large subunit rRNA (Ribozyme activity)

c)

tRNA (Transfer RNA)

d)

mRNA (Messenger RNA)

72.

DNA replication in eukaryotes differs from prokaryotes primarily because eukaryotes have:

a)

A. A single origin of replication

b)

B. Multiple origins of replication on linear chromosomes

c)

C. A different DNA polymerase (DNA Pol I and III)

d)

D. Coupled transcription and translation

73.

The enzyme that adds repetitive DNA sequences to the ends of chromosomes to compensate for the shortening that occurs during replication in some cell types is called:

a)

DNA Ligase

b)

Helicase

c)

Telomerase

d)

Topoisomerase

74.

A mutation occurs in a gene, but the resulting protein product is completely normal and functional. Which DNA repair mechanism is most likely to have corrected this error?

a)

Non-homologous end joining

b)

Non-sense mediated decay

75.

The trp operon is a repressible system. High intracellular levels of the amino acid tryptophan cause the operon to be repressed by:

a)

Binding to the promoter and blocking RNA Polymerase

b)

Binding to the repressor protein, causing it to bind the operator

c)

Activating an activator protein that prevents transcription

d)

Directly cleaving the mRNA molecule

76.

A forensic scientist needs to amplify a minuscule amount of DNA found at a crime scene to generate enough material for analysis. Which biotechnology technique is best suited for this goal?

a)

Southern Blotting

b)

RFLP

c)

PCR (Polymerase Chain Reaction)

d)

DNA Sequencing

77.

RFLP (Restriction Fragment Length Polymorphism) is a technique used in genetic fingerprinting that relies on variations in the length of DNA fragments produced by:

a)

DNA Polymerase

b)

tRNA

c)

Restriction endonucleases (Restriction Enzymes)

d)

Reverse transcriptase

78.

The Western Blot technique is used to identify and separate a specific molecule from a complex mixture of proteins based on their size and binding affinity. The probe used in a Western Blot is typically a(n):

a)

Single-stranded DNA molecule

b)

RNA molecule

c)

Antibody specific to the target protein

d)

Restriction endonuclease

79.

Which technique is used to determine the exact order of nucleotide bases in a DNA molecule, a process fundamental to the Human Genome Project (HGP)?

a)

Northern Blotting

b)

Gel Electrophoresis

c)

PCR

d)

Sanger or Next-Generation DNA Sequencing

80.

In molecular cloning, which enzyme is essential for joining (ligating) the desired DNA fragment into a plasmid vector?

a)

Reverse Transcriptase

b)

DNA Ligase

c)

RNA Polymerase

d)

Restriction Enzyme