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CLO4,5

Total questions: 79

Worksheet time: 40mins

Name
Class
Date
1.

During which of these stages of cell division do chromatids separate and move to the poles of the spindle?

a)

anaphase of mitosis and anaphase 1 of meiosis

b)

anaphase of mitosis and anaphase 2 of meiosis

c)

anaphase 1 and 2 of meiosis

d)

anaphase of mitosis only

2.

Which of the following best describes the function of homeostasis?

a)

Keeps the calcium level very high in the blood.

b)

Maintenance of the balance of the body's internal environment and metabolic processes.

c)

Keeps the O2 levels low in the blood.

d)

Keeps the CO2 levels high in the blood.

3.

what hormone is produced in the pancreas that lowers blood sugar?

a)

Glucose

b)

Ketones

c)

Insulin

d)

Glucagon

4.

How does the body remove excess carbon dioxide from the body?

a)

By gas exchange in the kidneys.

b)

By gas exchange in the liver.

c)

By gas exchange in the skin.

d)

By gas exchange in the lungs.

5.

Negative feedback is when a factor is changed, the effect will_______?

a)

occur in the same direction.

b)

will not change anything.

c)

strengthens or enhances the change.

d)

produce opposite effect.

6.

What happens when blood sugar levels become too high?

a)

Exotoxin is secreted, causing the conversion of glycogen to glucose

b)

Insulin is secreted, causing the conversion of glucose to glycogen

c)

Glucagon is secreted, causing the conversion of glucose to glycagen

d)

Insulin is secreted, causing the conversion of glycogen to glucose

7.

An organism that has two identical alleles for a given trait is called           for that trait.

a)

recessive

b)

dominant

c)

homozygous

d)

heterozygous

8.

An allele for a particular trait that is weak and only expressed in the presence of a second copy of the same allele is called?

a)

heterozygous

b)

co-dominant

c)

dominant

d)

recessive

9.

Which of the following hormones is produced by the pancreas?

a)

Glucagon

b)

Thyroxine

c)

Growth hormone

d)

Oxytocin

10.

The normal human males have______ as their genotype of sex chromosomes.

a)

XXY

b)

XY

c)

X

d)

XX

11.

Excretion regulation happens when organisms regulate ??

a)

water and chemical composition of body fluids

b)

oxygen and carbon dioxide

c)

temperature

d)

blood glucose

12.

If the cells continue to grow uncontrollably, spread and are life threatening this is a                tumor.

a)

malignant

b)

localised

c)

confined

d)

benign

13.

A human being has           autosomes and           sex chromosomes.

a)

22 pairs, 1 pair

b)

23,23

c)

23,1

d)

2,2

14.

Each chromosome consists of two identical____?

a)

nuclei

b)

chromatids

c)

genes

d)

bases

15.

How many chromosomes do somatic cells have?

a)

43

b)

23

c)

46

d)

12

16.

Which of the following is a function of mitosis?

a)

Production of haploid daughter cells

b)

Growth and repair tissues

c)

Genetic diversity

d)

Production of genetically different daughter cells

17.

Mitosis results in_____

a)

4 haploid daughter cells

b)

2 diploid identical daughter cells

c)

2 haploid daughter cells

d)

4 diploid daughter cells

18.

A cell with 46 chromosomes undergoes mitosis ,how many chromosomes are in each daughter cell?

a)

23

b)

92

c)

44

d)

46

19.

Crossing-over occurs in______

a)

prophase 2

b)

anaphase 1

c)

metaphase 1

d)

prophase 1

20.

Which of the following cells go for Mitosis?

a)

Skin cells

b)

Sperm cells

c)

Egg cells

d)

Sex cells

21.

______are made up of chromosome pairs of approximately the same length centromere position?

a)

Homologous Chromosomes

b)

Alleles

c)

Genotypes

d)

Phenotypes

22.

Having two different alleles for a trait is called_____?

a)

homozygous

b)

phenotype

c)

heterozygous

d)

protein

23.

In humans, what is the probability that a couple's first child will be a boy?

a)

50%

b)

0%

c)

100%

d)

25%

24.

The observable expression of the genes present in an organism is called____?

a)

inheritance

b)

genotype

c)

phenotype

d)

punnet squares

25.

Which of the following hormones does control the child birth?

a)

Growth hormone

b)

Thyroxin

c)

Glucagon

d)

Oxytocin

26.

Meiosis results in_____

a)

4 haploid daughter cells

b)

2 haploid daughter cells

c)

4 diploid daughter cells

d)

2 diploid daughter cells

27.

Interstitial fluid is formed of_____

a)

red blood cells

b)

plasma

c)

blood

d)

cerebrospinal fluid

28.

The combination of genes present in an individual is referred to as?

a)

pedigree

b)

phenotype

c)

Punnett squares

d)

genotype

29.

Homeostatic regulation of body temperature is an example of_____?

a)

positive feedback

b)

disease

c)

chaotic information loop

d)

negative feedback

30.

Which of the following is a function of meiosis?

a)

Growth

b)

Development

c)

Replacement

d)

Genetic diversity

31.

Which of the following cells undergo Meiosis?

a)

Egg cells

b)

Liver cells

c)

Unicellular organisms

d)

All of these

32.

Which of the following describes the purpose of the mitosis cell cycle?

a)

Production of genetically identical daughter cells

b)

Repair of tissues

c)

For growth and repair.

d)

All of the above.

33.

A genotype is?

a)

recessive trait

b)

genetic make up of an organism

c)

genetic variation

d)

medicine and agriculture

34.

During which parts of the cell cycle does the cell grow?

a)

Meiosis

b)

Mitossis phase and cytokinesis

c)

G1 and G2

d)

G1 and S

35.

Thermoregulation happens when organisms regulate?

a)

oxygen and carbon dioxide

b)

temperature

c)

blood glucose

d)

water and solutes

36.

In humans, what is the probability that a couple's first child will be a girl?

a)

25%

b)

50%

c)

0%

d)

100%

37.

Having two same alleles for a trait is called____?

a)

genotype

b)

homozygous

c)

protein

d)

heterozygous

38.

These two body systems regulate feedback mechanisms are_____?

a)

Muscular & Nervous

b)

Endocrine & Nervous

c)

Skeletal & Muscular

d)

Skeletal & Endocrine

39.

The uncontrolled division of cells that results in either malignant or benign growth is called____?

a)

mitosis

b)

tissues

c)

telophase

d)

tumor

40.

Phenotype is the___?

a)

Complete genome of a person

b)

Total number of chromosomes in a person

c)

Complete observable characteristics of a person

d)

Complete genetic traits of a person

41.

All of the following are true about Mitosis EXCEPT:

a)

Can take place in brain cells

b)

Also known as asexual division

c)

Takes place in all somatic cells

d)

Produces genetically identical daughter cells

42.

In positive feedback, The feedback signal or output____?

a)

does not relate to the action

b)

increases the action

c)

has no effect

d)

decreases the action

43.

Chromosomes that have the same sequence of genes and the same structure are??

a)

Phenotypes

b)

Genotypes

c)

Homologous Chromosomes

d)

Alleles

44.

Osmoregulation happens when organisms regulate____?

a)

temperature

b)

oxygen

c)

blood glucose

d)

water

45.

In a feedback system, receives the message from the receptor center and sends a message to the effector is?

a)

receptor

b)

effector

c)

control centre

d)

stimulus

46.

The normal human females have_____as their genotype of sex chromosomes.

a)

X

b)

XX

c)

XY

d)

XXY

47.

If a person receives an X and a Y chromosome, that person is____?

a)

male

b)

female

c)

red eye

d)

mentally challenged

48.

The sister chromatids are held together by the??

a)

Centromere

b)

Nucleus

c)

DNA

d)

Centriole

49.

A cell with a diploid number of 30 undergoes meiosis, how many chromosomes are in each daughter cell?

a)

30

b)

60

c)

6

d)

15

50.

Excess of glucose will be stored in liver in what form?

a)

glucose

b)

glucagon

c)

glycogen

d)

insulin

51.

Which is of the following statements is correct regarding sex chromosomes?

a)

Females have two X chromosomes.Males have an X chromosome and a Y chromosome

b)

Males have two X chromosomes.Females have an X chromosome and a Y chromosome

c)

lf an X sperm fertilizes the egg, it will be a boy

d)

 If a Y sperm fertilizes the egg the baby will be a girl

52.

Which statement is true about glucagon hormone?

a)

Causes the break-down of glycogen into glucose.

b)

Released f the blood glucose level is too high.

c)

Released by the beta celis of pancreas.

d)

Convert ghucose into stored glycogen in the Liver.

53.

The fluid found inside cells is called____?

a)

intracellular

b)

intravascular

c)

interstitial

d)

extracellular

54.

Nervous system regulates homeostasis by?

a)

sending nerve impulses to effectors.

b)

secreting sex hormones.

c)

releasing hormones.

d)

secreting digestive juices.

55.

A cell with 30 chromosomes undergoes mitosis,how many chromosomes are in each daughter cell?

a)

90

b)

15

c)

30

d)

60

56.

Meiosis involves______divisions.

a)

two

b)

three

c)

four

d)

one

57.

An example of positive feedback mechanism is?

a)

Controlling blood glucose level

b)

child birth

c)

 Water regulation

d)

 Temperature regulation

58.

The internal environment of the body refers to____?

a)

The intracellular fluid

b)

All body fluids

c)

The tissue fluid (extracellular fluid)

d)

The blood

59.

In a feedback system,the one which detects the changes is?

a)

receptor

b)

stimulus

c)

target organ

d)

control centre

60.

If a person receives an X and a X chromosome,that person is?

a)

male

b)

female

c)

red eye

d)

mentally challenged

61.

In the phase of the cell division shown in the diagram below,which of the following is happening?

a)

New nucleus starts to form.

b)

The chromosomes are lined up in the equator (centre) of the cell.

c)

The cytoplasm starts to divide.

d)

The nuclear membrane starts to disintegrate (break up).

62.

Name the phase of cell division shown in the diagram below.

a)

metaphase

b)

anaphase

c)

telophase

d)

prophase

63.

During Meiosis,homologous chromosomes move apart during:

a)

Prophase ll

b)

Anaphase l

c)

Metaphase l

d)

Anaphase ll

64.

Name the phase of cell division shown in the diagram.

a)

anaphase

b)

interphase

c)

prophase

d)

metaphase

65.

Name the phase of cell division shown in the diagram below.

a)

prophase

b)

telophase

c)

anaphase

d)

metaphase

66.

When parts between the DNA of the chromosomes are exchanged,this process is called?

a)

crossing over

b)

replication

c)

division

d)

transcription

67.

what is the genotype in the missing box below denoted(?).

a)

AA

b)

a

c)

Aa

d)

aa

68.

What is structure A in this illustration?

a)

Nucleus

b)

Eukaryotic Cell

c)

RNA

d)

Chromosome

69.

Which label best represents the area marked Y?

a)

Eukaryotic Cell

b)

Chromosome

c)

DNA

d)

Nucleus

70.

Which label best represents the area marked Z?

a)

Chromosome

b)

RNA

c)

Gene

d)

Eukaryotic Cell

71.

which phase of the cell cycle DNA replication takes place?

a)

G1 phase

b)

G2 phase

c)

S phase

d)

Mitosis

72.

The diagram below shows the different stages of Mitosis. What is the correct sequence of

the cell division?

a)

C,A,B,D

b)

A,B,C,D

c)

D,C,B,A

d)

B,C,A,D

73.

What percentage of the children will be affected for this recessive disease?

a)

50%

b)

25%

c)

100%

d)

0%

74.

Assume that in humans,B=Brown hair,b=blond hair.What percent of their offspring will have homozygous brown hair?

a)

0%

b)

75%

c)

25%

d)

100%

75.

What is shown in the picture?

a)

Cytokinesis

b)

Anaphase

c)

Mitosis

d)

Interphase

76.

A recessive gene for hemophilia is "h". What percent chance of the children will be carriers of the hemophilia gene?

a)

75%

b)

0%

c)

25%

d)

50%

77.

A person with AB blood type married with someone with A blood type. Which of the following is a possible phenotype for their offspring that in Punnett square 4?

a)

O

b)

AB

c)

A

d)

B

78.

In which stage of meiosis are chiasmata formed?

a)

Anaphase 1

b)

Telophase 2

c)

Prophase 1

d)

Prophase 2

79.

______is the section of DNA that codes for one particular trait.

a)

Eukaryotic cell

b)

Gene

c)

Chromosome

d)

Chromatid

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