akidszone.com – MCQs, Mock Tests | NEET Test Series-2021 to 2022 NEET Biology MCQS Mock Test Paper 44

1 ï»¿Â The chances of an offspring to have Down syndrome __________ with the motherâ€™s age

A Â Decreases B Â Increases C Â is not influenced D Â there is no correlation

✅ Correct Answer: 2

2 Â There are several variations of Down syndrome with Trisomy 21 accounting for close to 95% of all cases recorded. There is another form of the syndrome that occurs when a segment of the 21st chromosome detaches to attach itself to another chromosome. Its name is

A Displacement B Transportation C Â Translocation D Relocation

✅ Correct Answer: 3

3 Â This cell is the longest in the human body

A Muscle cells B Nerve cells C Â Bone cells D Gland cells

✅ Correct Answer: 2

4 This tissue includes the blood tissue

A Muscle tissue B Connective tissue C Â Epithelial tissue D Nervous tissue

✅ Correct Answer: 2

5 Which of this is/are examples of an organ containing a smooth muscle

A Iris of eye B Bronchi only C Uterus only D All of the above

✅ Correct Answer: 4

6 This structure of the plant cell is non-living

A Â Nucleus B cell wall C cytoplasm D Mitochondrion

✅ Correct Answer: 2

7 This cell organelle does not contain DNA

A Nucleus B Â Mitochondria C Lysosomes D Â Chloroplast

✅ Correct Answer: 3

8 The main difference between human cheek cells and onion peel cells is

A Presence of cell wall in onion peel cells B Â Presence of mitochondria in onion peel cells C Absence of endoplasmic reticulum in cheek cells D Absence of the plasma membrane in cheek cells

✅ Correct Answer: 1

9 This jellylike substance inside the plasma membrane in which all cell organelles are floating is

A Â Cytoplasm B Â Tonoplasm C Â Karyoplasm D Cell sap

✅ Correct Answer: 1

10 The organelle serving as a primary packaging area for molecules that will be distributed throughout the cell is

A Vacuole B Plastids C Mitochondria D Â Golgi apparatus

✅ Correct Answer: 4

11 Animal cells are interconnected by

A Plasma membrane B Â Cell wall C Desmosomes D Plasmodesmata

✅ Correct Answer: 3

12 The Cell theory is not applicable to

A Fungi B Algae C Virus D Â Microbes

✅ Correct Answer: 3

13 Â In Swiss cheese, big holes are made by a

A Â bacterium producing methane gas B machine C fungus releasing a lot of gases while its metabolic activities D Â bacterium producing large quantities of carbon dioxide

✅ Correct Answer: 4

14 Â During which stage of the purification of the sewage water are microbes used?

A Â Primary treatment B Â Secondary treatment C Tertiary treatment D Both (1) and (2)

✅ Correct Answer: 2

15 What does a high value of BOD(Biochemical Oxygen Demand) indicate?

A Â That water is pure B Â that water is less polluted C that water is highly polluted D Â that consumption of organic matter by microbes is higher in the water

✅ Correct Answer: 3

16 This is a good producer of citric acid

A Aspergillus B Clostridium C Â Saccharomyces D Â Pseudomonas

✅ Correct Answer: 1

17 This is not an example of performing biological control of diseases/pests using microbes

A Â Trichoderma sp. against some plant pathogens B Nucleopolyhedrovirus against insects and other arthropods C Â Ladybird beetle against aphids D Â Bt-cotton to increase yield

✅ Correct Answer: 4

18 This is chiefly produced by the activity of an anaerobic bacteria on sewage

A Â Laughing gas B Propane C Mustard gas D Marsh gas

✅ Correct Answer: 4

19 For the production of ethanol, the most common substrate used in distilleries is

A Â Soya meal B Molasses C Ground gram D cornmeal

✅ Correct Answer: 2

20 This is not a biofertilizer

A Agrobacterium B Nostoc C Rhizobium D Mycorrhiza

✅ Correct Answer: 1

21 Â Carbon dioxide is not released in which of the following processes?

A Lactate fermentation B Alcoholic fermentation C Aerobic respiration in animals D Aerobic respiration in plants

✅ Correct Answer: 1

22 In the rainy season, doors get swelled up due to

A Transpiration B Imbibition C Diffusion D Respiration

✅ Correct Answer: 2

23 This statement regarding enzyme inhibition is correct

A Â non-competitive inhibitors often bind to the enzyme irreversibly B non-competitive inhibition of an enzyme can be overcome by adding a large amount of substrate C competitive inhibition is observed when substrate and inhibitor compete for the active site on enzyme D competitive inhibition is observed when substrate competes with an enzyme to bind to an inhibitor protein

✅ Correct Answer: 3

24 In C3 and C4 plants, primary carboxylation takes place with the help of

A Â PEP carboxylse and pyruvate carboxylase B RuBP carboxylase and PEP carboxylase C PEP carboxylase and RuBP carboxylase D RuBP carboxylase and pyruvate carboxylase

✅ Correct Answer: 2

25 Peroxisomes are involved in which type of reactions pertaining to plant photosynthesis?

A Calvin Cycle B Glycolytic cycle C Glyoxylate cycle D Bacterial photosynthesis

✅ Correct Answer: 3

26 The fundamental feature of Kranz Anatomy of C4 plants is

A Â Presence of agranal chloroplasts in bundle sheath cells and granal chloroplasts in mesophyll cells B Presence of granal chloroplasts in bundle sheath cells and agranal chloroplasts in mesophyll cells C Presence of chloroplasts in epidermal and mesophyll cells D Â Presence of agranal chloroplasts in both mesophyll and bundle sheath cells

✅ Correct Answer: 1

27 The statement which is incorrect with respect to enzyme action is

A Addition of a lot of succinates does not reverse the inhibition of succinic dehydrogenase by malonate B Â the substrate binds with the enzyme as its active site C Â a non-competitive inhibitor binds the enzyme at a site distinct from that which binds the substrate D malonate is a competitive inhibitor of succinic dehydrogenase

✅ Correct Answer: 1

28 A phosphoglyceride is always composed of

A only an unsaturated fatty acid esterified to a glycerol molecule to which a phosphate the group is also attached B Â only a saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached C Â an unsaturated or saturated fatty acid esterified to a phosphate molecule to which a glycerol molecule is also attached D an unsaturated or saturated fatty acid esterified to a glycerol molecule to which a phosphate group is also attached

✅ Correct Answer: 4

29 Macromolecule chitin is

A Â phosphorous containing polysaccharide B nitrogen containing polysaccharide C Â sulphur containing polysaccharide D simple polysaccharide

✅ Correct Answer: 2

30 This is a wrongly matched pair

A Alcohol â€“ Nitrogenase B Detergents â€“ Lipase C Textile â€“ Amylase D Fruit juice â€“ Pectinase

✅ Correct Answer: 1

31 The most abundant protein in the animal world is

A Trypsin B Collagen C Haemoglobin D Insulin

✅ Correct Answer: 2

32 Â This amongst the following statements is incorrect. Human spermatozoa usually

A moves with the help of their tails B Â contains enzyme in their head which aids in penetration of the ovum C Â are released in large numbers after a few days of abstinence D at a concentration of 1 million/ml of ejaculate will fertilize the ovum

✅ Correct Answer: 4

33 Polar bodies are formed during

A Oogenesis B Â Spermatogenesis C Gametogenesis D Spermateleosis

✅ Correct Answer: 1

34 In spermatogenesis, the phases of maturation involve

A formation of spermatids from primary spermatocytes through meiosis B Growth of spermatogonia into primary spermatocytes C Â formation of spermatogonia from gonocytes through mitosis D Â formation of oogonia from spermatocytes through meiosis

✅ Correct Answer: 1

35 This happens during spermatogenesis

A Meiosis B Â Mitosis C Meiosis and mitosis D Â None of these

✅ Correct Answer: 3

36 The actual genetic section of sperm is its

A Acrosome B Tail C Â Middle piece D Head

✅ Correct Answer: 4

37 The process of spermatogenesis is induced by

A TSH B Â FSH C Â MSH D Â ACTH

✅ Correct Answer: 2

38 The number of spermatozoa, a single primary spermatocyte finally produced in spermatogenesis is

A 2 B 4 C 6 D 8

✅ Correct Answer: 2

39 The acrosome of sperm is formed from

A Mitochondria of spermatid B Â Golgi complex of spermatid C Nucleus of spermatid D Centrosome of spermatid

✅ Correct Answer: 2

40 Which of the following cells is immortal?

A Glomerular cells B Â Somatic cells C Cells of pituitary D Germ cells

✅ Correct Answer: 4

41 This molecule acts as molecular chaperones to assist the folding of proteins

A Vitamins B Â Carbohydrates C Amides D Lipids

✅ Correct Answer: 4

42 Which of these is not a lipid?

A Fats B Â Oils C Proteins D Â Waxes

✅ Correct Answer: 3

43 The abundantly distributed enzyme in germinating seeds and adipocytes is

A Lipase B Â Proteases C Cellulase D Nuclease

✅ Correct Answer: 1

44 Beta-oxidation of fatty acids occurs in

A Peroxisome B Peroxisome and Mitochondria C Mitochondria D Peroxisome, Mitochindria and ER

✅ Correct Answer: 3

45 Â An example of ____________ is Carnauba wax

A Soft wax B Liquid wax C Hard wax D Archaebacterial wax

✅ Correct Answer: 3

46 Â In fats, the number of OH groups can be expressed as

A Â Reichert-Meissil number B Polenske number C Â Iodine number D Acetyl number

✅ Correct Answer: 4

47 Â Rancidity of lipids of lipid-rich foodstuff is because of

A Â Reduction of fatty acids B Â Hydrogenation of unsaturated fatty acids C Â Dehydrogenation of saturated fatty acids D Oxidation of fatty acids

✅ Correct Answer: 4

48 This is an example of derived lipids

A Terpenes B Steroids C Â Carotenoids D Â All of the above

✅ Correct Answer: 4

49 The degree of unsaturation of lipids can be measured as

A Iodine number B Â Saponification number C Â Reichert Meissel number D Â Polenske number

✅ Correct Answer: 1

50 The specific gravity of lipid is

A 1.5 B 1 C 0.8 D Â 0.2

✅ Correct Answer: 3

NEET Test Series-2021 to 2022 — Learn

NEET Biology MCQS Mock Test Paper 44