NEET Zoology Practice Test Paper 3 by TEACHING CARE online tuition and coaching classes

1. Which of the following molecules is stored in the liver and broken down when the body needs energy?
2. starch
3. maltose
4. cellulose
5. glycogen

Z

2. What type of molecule is hemoglobin?
3. a steroid
4. a protein
5. a nucleic acid
6. a carbohydrate

Z

3. A person’s blood pressure reading is measured at 150/80. Which of the following is greater than normal?
4. systolic pressure
5. diameter of veins
6. diastolic pressure
7. capillary diameter

Z

4. Rings of cartilage surround which of the following structures?
5. the alveoli
6. the bronchi
7. the pharynx
8. the bronchioles

Z

5. What structure is lined with cilia?
6. the trachea
7. the pharynx
8. the epiglottis
9. the pleural membranes

Z

6. What structures increase the surface area in the lungs?
7. the villi
8. the alveoli
9. the bronchi
10. the pleural membranes

Z

7. Which of the following causes a drop in the air pressure within the thoracic cavity?
8. The rib cage moves up and out.
9. Air moves into the thoracic cavity.
10. The diaphragm becomes dome shaped.
11. The medulla oblongata sends fewer nerve impulses.

Z

8. Which of the following conditions results in fewer hydrogen ions being excreted into the urine?
9. increased blood pH
10. decreased blood pH
11. secretion of aldosterone
12. secretion of antidiuretic hormone (ADH)

Z

9. Fertilization usually takes place in the
10. ovary.
11. uterus.
12. cervix.
13. oviducts.

Z

10. Which phase occurs on days 15–28 of the uterine cycle?
11. the luteal phase
12. the follicular phase
13. the secretory phase
14. the proliferative phase

Z

11. The quaternary structure of a protein is
12. a helix.
13. a pleated sheet.
14. joined polypeptides.
15. a linear sequence of amino acids.

B

12. Which of the following is not a characteristic of DNA?
13. The strands form a double helix.
14. The adenine bonds with thymine.
15. The strands are held together by ionic bonds.
16. The backbone consists of sugar and phosphate
17. At which of the following does transcription occur?
18. the vacuoles
19. the ribosomes
20. the Golgi bodies
21. the chromosomes

B

14. Transcription and translation both result in molecules which
15. contain deoxyribose.
16. contain nitrogen atoms.
17. have a tertiary structure.
18. are produced in the cytoplasm

B

15. Mutations may be defined as changes in the
16. arrangement of amino acids in nucleic acids.
17. sequence of nitrogenous bases in nucleic acids.
18. bonding occurring between bases in nucleic acids.
19. structure of the DNA sugar-phosphate backbones

B

16. Oxygen moves through a cell membrane by
17. osmosis.
18. diffusion.
19. active transport.
20. facilitated transport

B

17. Which of the following describes a coenzyme?
18. a protein molecule that speeds up a reaction
19. a metal ion that binds to the enzyme changing its shape
20. a substance that aids an organic catalyst by donating atoms
21. a substrate that joins with an enzyme to form an enzyme-substrate complex

B

18. Which of the following produces a hormone that increases the rate of the chemical reactions that occur in all body cells?
19. the testes
20. the thyroid gland
21. the adrenal gland
22. the pituitary gland

Z

19. Which of the following absorb glucose?
20. veins
21. nodes
22. lacteals
23. capillaries

Z

33. Which of the following is a function of a vein?
34. to carry oxygenated blood away from the lungs
35. to carry oxygenated blood from the heart to the stomach
36. to carry deoxygenated blood away from the right atrium
37. to carry deoxygenated blood from the iliac artery to the leg

Z

20. Which of the following organs produces urea?
21. the liver
22. the kidney
23. the stomach
24. the small intestine

Z

21. What blood vessels carry blood to and from the intestines?
22. the iliac artery and the iliac vein
23. the carotid artery and the jugular vein
24. the hepatic portal vein and the hepatic vein
25. the mesenteric artery and the hepatic portal vein

Z

22. What blood vessel carries blood from the fetus to the placenta?
23. arterial duct
24. umbilical vein
25. umbilical artery
26. posterior vena cava

Z

23. Which of the following engulf disease-causing bacteria?
24. the platelets
25. the bone marrow
26. the red blood cells
27. the white blood cells

Z

24. Between which of the following does external respiration occur?
25. the alveoli and the lung capillaries
26. the tissue fluid and the tissue cells
27. the mitochondria and the cytoplasm
28. the tissue capillaries and the tissue fluid

Z

25. Most of the carbon dioxide produced during exercise returns to the lungs as
26. bicarbonate ions.
27. reduced hemoglobin.
28. carbaminohemoglobin.
29. dissolved carbon dioxide.

Z

 

26. What two substances combine in the blood resulting in a decrease in pH?
27. oxygen and hemoglobin
28. carbon dioxide and water
29. hemoglobin and fibrinogen
30. carbonic anhydrase and carbon dioxide

Z

27. Stimulation of which of the following causes the pupils to dilate?
28. the central nervous system
29. the somatic nervous system
30. the sympathetic nervous system
31. the parasympathetic nervous system

Z

28. Which of the following results from increased aldosterone secretion?
29. increased blood volume and increased urine production
30. increased blood volume and decreased urine production
31. decreased blood volume and increased urine production
32. decreased blood volume and decreased urine production

Z

29. Parthenocarpic tomato fruits can be produced by

(a) removing androecium of flowers before pollen grains are released

  (b) treating the plants with low  concentrations of gibberellic acid and auxins

(c) raising the plants from vernalized seeds

(d) treating the plants with phenyl   mercuric acetate

B

30. What type of placentation is seen in sweet pea?

(a) Basal   (b) Axile

(c) Free central  (d) Marginal

B

31. In a cereal grain the single cotyledon of embryo is represented   by

(a) coleorhiza           (b) scutellum

(c) Aleurone layer   (d) coleoptile

B

32. Male gametes in angiosperms are formed by the division of

(a) microspore        (b) generative cell

(c) vegetative cell  (d) microspore mother cell

B

33. Which one of the following is surrounded by callose wall ?

(a) Microspore mother cell  (b) Male gamete

(c) Egg                                  (d) Pollen grain

 

B

34. Phototropic and geotropic movements are linked to

(a) gibberel lins   (b) enzymes

  (c) auxins            (d) cytokinins

B

35. The movement of water from one cell of  the  cortex to the adjacent one  in roots is due to

(a) accumulation of inorganic salts in the cells

(b) accumulation of organic compounds in the cells

(c) chemical potential gradient

(d) water potential gradient

B

 

36. Spermatogenesis occurs in the
37. vas deferens.
38. interstitial cells.
39. seminal vesicles.
40. seminiferous tubules.

Z

37. What is a function of bicarbonate ions in semen?
38. to fertilize the ovum
39. to nourish sperm cells
40. to increase the pH of the vagina
41. to cause contraction of the uterus

Z

38. What effect does the hormone that causes development of the corpus luteum in females

have in males?

1. ejaculation
2. sperm production
3. testosterone production
4. release of luteinizing hormone (LH)

Z

 

39. Which of the following results from the secretion of gonadotropin-releasing hormone (GnRH)

during days 1 to 13 of the menstrual cycle?

1. menstruation
2. secretion of estrogen by the follicle
3. secretion of progesterone by the corpus luteum
4. production of human chorionic gonadotropin (HCG)

Z

40. Which of the following is a monomer of polysaccharides?
41. glycine
42. glucose
43. adenine
44. glycogen

Z

41. Which of the following is not a function of a protein?
42. storing genetic information
43. catalyzing cellular reactions
44. sending chemical messages
45. transporting glucose into a cell

B

42. Which of the following occurs during complementary base pairing?
43. Bonds form between uracil and thymine.
44. Bonds form between cytosine and guanine.
45. Bonds break between phosphates and sugars.
46. Bonds break between amino acids and phosphates.

B

43. The sequence of bases in one strand of a DNA molecule is C C G T A C. Which of the

following represents the sequence of bases that attach to this strand during replication?

1. G G C A T G
2. G G C U T G
3. C C G T AC
4. G G C A U G

B

44. One structural difference between DNA and tRNA is that
45. DNA has uracil and tRNA does not.
46. tRNA contains more bases than DNA.
47. DNA contains deoxyribose and tRNA does not.
48. tRNA contains more hydrogen bonds than DNA.

B

45. When cells are in a hypertonic solution, the concentration of solute in the cells is
46. the same as that of the solution.
47. higher than that of the solution.
48. lower than that of the solution.

B

46. Which of the following is a monomer of the mosaic component of the cell membrane?
47. glycerol
48. nucleotide
49. amino acid
50. phospholipid

B

 

47. A vesicle merges with the cell membrane during the process of
48. exocytosis.
49. pinocytosis.
50. phagocytosis.
51. facilitated transport.

B

48. Which of the following describes the function of an enzyme?
49. It speeds up a chemical reaction.
50. It increases the available substrate.
51. It increases the activation energy of a reaction.
52. It contributes atoms to facilitate a chemical reaction.

B

49. The chemical digestion of starch begins in the
50. mouth.
51. stomach.
52. duodenum.
53. salivary glands.

Z

50. In which structure does peristalsis not occur?
51. the liver
52. the stomach
53. the esophagus
54. the duodenum

Z

 

 

 

Hints and explainations:

3  Systolic means contraction

12 . The strands are held together by  H bonds

27 . the sympathetic nervous system stimulates activity

29 Parthenocarpy (literally meaning virgin fruit) is the natural or artificially induced production of fruit without fertilization of ovules. The fruit is therefore seedless.

31 A sheath-like structure found in a plant seed that connects the coleoptile to the primary root and acts as a protective covering enclosing the plumule and radicle.