WorksheetsFINAL EXAM 08/05/2020
Total questions: 50
Worksheet time: 25mins
Which of the following statements is not true for eukaryotic cells?
Linear DNA associated with histone proteins
Internal compartmentalization
True, nucleus, consisting of nuclear membrane and nucleoli.
Cell wall composed of peptidoglycan
A cell that produces large amounts of proteins for export would have a tremendous amount of
Rough endoplasmic reticulum
Smooth endoplasmic reticulum
Peroxisomes
Mitochondria
Which of the following is a non-protein enzyme?
Pepsin
Ribozyme
ATP synthase
Malate dehydrogenase
ATP hydrolysis is__________ process.
Exergonic
Endergonic
Both of A and B
Neither A nor B
Glycolysis takes place in __________ and is an ____________ process.
Cytoplasmic; aerobic
Cytoplasm; anaerobic
Mitochondria; anaerobic
Mitochondria; aerobic
Glucose catabolism is controlled by the concentration of ________ and _________.
Pyruvic acid; citrate
Glucose; citrate
Acetyl CoA; citrate
ATP; citrate
Which of the following statements is true?
Oxygen in photosynthesis comes from carbon dioxide.
Oxygen in photosynthesis comes from glucose.
Oxygen in photosynthesis comes from water.
Oxygen in photosynthesis comes from sunlight.
Photorespiration reduces the yield of photosynthesis because
higher temperature causes the stomata to open and oxygen build up inside the leaf.
higher temperature causes the stomata to close and carbon dioxide build up inside the leaf.
higher temperature causes the stomata to open and carbon dioxide build up inside the leaf.
higher temperature causes the stomata to close and oxygen build up inside the leaf.
Many organisms have ____________ that have no apparent function, but resemble functional structures their ancestors possessed.
Homologous structures
Vestigial structures
Heterologous structures
Pseudostructures
Evolutionary convergence is development of
Dissimilar characters in closely related groups.
Common set of characters in closely related groups.
Common set of characters in group of different ancestry.
Random mating.
Which of the following is an evolutionary advantage to the seed plants?
Water is not required to transport male gametophyte to female gametophyte.
Presence of vascular tissues.
Water in needed for fertilization.
Presence of photosynthetic pigments
Which of the following allows the plants to pause the development until the environmental conditions are favorable?
Fruit
Seed
Flower
Roots
_________ is the main component of wood.
Secondary phloem
Secondary xylem
Primary xylem
Primary phloem
Other than protecting the delicate tissue in the roots, root cap also functions in perception of ____________.
Light
Water
Gravity
Minerals
___________ provides the main force for movement of water and ionic solutes from roots to leaves.
Root pressure
Guttation
Photosynthesis
Transpiration
Carbohydrates enter the sieve tubes in the smallest veins at the source in a process known as ____________.
Phloem loading
Xylem loading
Bulk flow
Turgor pressure
All are examples of carnivorous plants except
Pitcher plant
Mycorrhizae in plants
Venus fly trap
Sundew
The root nodules in legumes contain nitrogen-fixing _________.
Fungi
Mycorrhizae
Bacteria
Plant cells
Some plants require exposure of seeds or shoots to chilling conditions in order for it to flower. This phenomenon is known as __________.
Phase change
Cooling
Germination
Vernalization
The elongated structure formed during embryo development which links the embryo to the nutrient tissue of the seed is called __________.
Suspensor
Stalk
Endosperm
Cotyledon
The stage in animal development that restores the diploid state of the cells is ___________.
Penetration of sperm into egg cytoplasm
Fertilization
Ovulation
Egg activation
This is the stage of zygote development when embryonic germ layers are laid down in order.
Blastulation
Implantation
Gastrulation
Organogenesis
A type of loose connective tissue proper that contains a large amount of ground substance and stores fats as droplets of triglycerides is ________.
Areolar tissue
Reticular tissue
Dense tissue
Adipose tissue
Intercalated discs are a characteristic feature of __________.
Cardiac muscle
Skeletal muscle
Smooth muscle
Bone
The acidic food moving from stomach into intestine is neutralized by ________ produced by________.
Bicarbonate buffer; liver
Bicarbonate buffer; pancreas
Bicarbonate buffer; gall bladder
Bicarbonate buffer; small intestine
The vitamin that is synthesized by microbial flora in the intestine, also found in green leafy vegetable, and plays a critical role in blood clotting is
A
D
K
E
Which one of the following describes saltatory conduction of nerve impulse in neurons?
Occurs only if the nodes of Ranvier are lacking.
Occurs only if the myelin sheath is continuous.
It is slower than conduction on an unmyelinated fiber.
It is faster than conduction on an unmyelinated fiber.
Which of the following is the correct sequence of nerve impulse in a typical reflex arc?
Receptor, afferent neuron, integration centre, efferent neuron, effector.
Receptor, efferent neuron, integration centre, afferent neuron, effector.
Effector, afferent neuron, integration centre, efferent neuron, receptor.
Effector, efferent neuron, integration centre, afferent neuron, receptor.
Which structure or structures are responsible for the sense of hearing and equilibrium?
Tympanic membrane
Cochlea and semicircular canals
Pinna and external auditory canal
Auditory tube
Correct order of path of sensory information from receptor to the central nervous system is:
Transduction -->Stimulation -->Transmission-->Interpretition
Transduction --> Transmission --> Stimulation-->Interpretition
Stimulation-->Transduction-->Transmission-->Interpretition
Transmission -->Transduction--> Stimulation-->Interpretition
Most hormones of the endocrine system are regulated by a:
Positive feedback mechanism.
Hormone-receptor complex.
Hormone-gene complex.
Negative feedback mechanism.
Endocrine glands differ from exocrine glands in that:
Endocrine glands are formed by epithelial tissue, but exocrine glands are primarily connective tissue.
Endocrine glands are all interconnected; whereas exocrine glands act completely independently.
Endocrine glands release hormones, whereas exocrine glands release waste.
Endocrine glands are ductless and exocrine glands release secretions at the body's surface or into ducts.
Intramembranous development of bones is seen in:
Bones of skull
Bones of arm
Bones of legs
Ribs
The correct order of events in cross-bridge cycle in muscle contraction is:
Sarcoplasmic reticulum releases Ca2+ -->Myosin binds to actin-->Action potential arrives from neuron-->Ca2+ binds to troponin
Action potential arrives from neuron-->Sarcoplasmic reticulum releases Ca2+-->Ca2+ binds to troponin-->Myosin binds to actin
Myosin binds to actin-->Ca2+ binds to troponin-->Action potential arrives from neuron-->Sarcoplasmic reticulum releases Ca2+
Action potential arrives from neuron-->Sarcoplasmic reticulum releases Ca2+ -->Myosin binds to actin -->Ca2+ binds to troponin
At a higher altitude, you may have a difficulty breathing because
The concentration of carbon dioxide increases.
Lower temperature restrict the metabolic activity of oxygen at higher altitudes.
The partial pressure of oxygen is lower at higher altitudes.
Concentration of nitrogen increases with increase in altitude.
Holding breath for a long time results in _______ in the level of CO2 in the blood and CSF which causes ________ in pH.
Increase, increase
Decrease, increase
Decrease, increase
Increase; decrease
The lub dub sound of the heart beat is the sound of:
The heart valves closing.
The muscles of the heart contracting.
The blood moving in and out of the heart.
The blood moving in and out of the lungs.
The blood is pumped to the lungs from the heart through the:
Aorta.
Pulmonary arteries.
Pulmonary veins.
Vena cava.
Which of the following is NOT one of the steps that a nephron uses to carry out its function?
Filtration
Reabsorption
Selection
Secretion
The cup-shaped swelling that is formed by the blind end of the glomerulus tubule is called:
Loop of Henle
Renal Pelvis
Nephron
Bowman's Capsule
The kidneys not only remove the waste products from the blood but also play a very important role in maintaining
Constant composition of the blood irrespective of the nature of the food or fluid intake.
Equilibrium of the body.
Temperature of the body.
Blood pressure constant.
Birds can not produce urine as concentrated as mammals because
The birds do not have nephrons with short loop of Henle.
The birds have few or no nephrons with long loop of Henle.
The birds do not have loop of Henle in nephrons.
The birds have only long loop of Henle in their nephrons.
The mechanism that produces concentrated urine in mammals in loop of Henle is known as
Cross-current mechanism.
Concurrent mechanism
Counter-current mechanism.
Filtration
The white paste like texture of bird droppings is because of the presence of _________ in the excretion.
Urea
Ammonia
Nitrogen
Uric acid
Mycobacterium tuberculosis evades the recognition and attack by the immune system by
Inhibiting the fusion of phagosome with the lysosome.
Inhibiting the formation of phagosome.
Inhibiting the formation of lysosome.
Inhibiting the formation of granules in phagocytes.
Type IV or delayed type hypersensitivity is mediated by
TH cells and IgE
TH cells and macrophages
Macrophages and IgE
Macrophages and IgD
production of a wide array of antibodies by the immune system is possible because of
Gene cloning and protein modification.
Mutations and translation.
DNA rearrangements and alternate splicing.
Alternative splicing and mutation.
Passage of maternal IgG antibodies through placenta to the unborn fetus is an example of
Active natural adaptive immunity.
Active artificial adaptive immunity.
Passive artificial adaptive immunity.
Passive natural adaptive immunity.
Memory is an important aspect of ______________, and it helps to mount a faster and stronger response at the subsequent exposure to the antigen seen previously by the immune system.
Adaptive immunity
Innate immunity
Both innate and adaptive immunity.
Neither innate nor adaptive immunity.
These cells play an important role in eliminating the virus infected cells and the tumor cells from the body.
Macrophages and helper T cells
Natural killer cells and cytotoxic T cells
Dendritic cells and B cells
Mast cells and plasma cells
