NEET : Biology (Zoology) : 2021- Exam Mode

Biology (Zoology) – NEET-2021 – Exam Mode

This quiz is in the format of Exam, has 50 questions ( Attempt 45 – 1to 35, from 36 to 50 any 10) . Results are displayed at end.

Total time duration : 45 Minutes
Points to remember
- Right answer : +4
- Wrong Answer : -1
- Number of attempts : Unlimited

1 / 50

Identify the incorrect pair

Alkaloids – Codeine

Toxin – Abrin

Lectins – Concanavalin A

Drugs – Ricin

2 / 50

The fruit fly has 8 chromosomes (2n) in each cell.During interphase of Mitosis if the number of chromosomes at G1 phase is 8, what would be the number of chromosomes after S phase

8

16

32

48

3 / 50

Match List – I with List – II

Choose the correct answer from the options given below.

(a) (b) (c) (d) :(iv) (iii) (i) (ii)

(a) (b) (c) (d) :(iii) (iv) (i) (ii)

(a) (b) (c) (d) :(iii) (iv) (ii) (i)

(a) (b) (c) (d) :(iv) (i) (ii) (iii)

4 / 50

Match List-I with List-II.

	List – I		List – II
a	Vaults	i	Entry of sperm through Cervix is blocked
b	IUDs	ii	Removal of Vas deferens
c	Vasectomy	iii	Phagocytosis of sperms within the Uterus
d	Tubectomy	iv	Removal of fallopian tube

Choose the correct answer from the options given below

(a) (b) (c) (d) : (iv) (ii) (i) (iii)

(a) (b) (c) (d) :(i) (iii) (ii) (iv)

(a) (b) (c) (d) :(ii) (iv) (iii) (i)

(a) (b) (c) (d) :(iii) (i) (iv) (ii)

5 / 50

If Adenine makes 30% of the DNA molecule, what will be the percentage of Thymine, Guanine and Cytosine in it?

T : 20 ; G : 30 ; C : 20

T : 20 ; G : 20 ; C : 30

T : 30 ; G : 20 ; C : 20

T : 20 ; G : 25 ; C : 25

6 / 50

Which of the following RNAs is not required for the synthesis of protein?

mRNA

tRNA

rRNA

siRNA

7 / 50

Which one of the following is an example of Hormone releasing IUD?

CuT

LNG 20

Cu 7

Multiload 375

8 / 50

Succus entericus is referred to as:

Pancreatic juice

Intestinal juice

Gastric juice

Chyme

9 / 50

Chronic auto immune disorder affecting neuron muscular junction leading to fatigue, weakening and paralysis of skeletal muscle is called as:

Arthritis

Muscular dystrophy

Myasthenia gravis

Gout

10 / 50

With regard to insulin choose correct options.

(a) C-peptide is not present in mature insulin.
(b) The insulin produced by rDNA technology has Cpeptide.
(c) The pro-insulin has C-peptide
(d) A-peptide and B-peptide of insulin are interconnected by disulphide bridges.

Choose the correct answer from the options given below

(b) and (d) only

(b) and (c) only

(a), (c) and (d) only

(a) and (d) only

11 / 50

Which one of the following belongs to the family Muscidae?

Fire fly

Grasshopper

Cockroach

House fly

12 / 50

Which is the “Only enzyme” that has “Capability” to catalyse Initiation, Elongation and Termination in the process of transcription in prokaryotes?

DNA dependent DNA polymerase

DNA dependent RNA polymerase

DNA Ligase

DNase

13 / 50

Receptors for sperm binding in mammals are present on :

Corona radiata

Vitelline membrane

Perivitelline space

Zona pellucida

14 / 50

The centriole undergoes duplication during:

S-phase

Prophase

Metaphase

G2 phase

15 / 50

Which one of the following organisms bears hollow and pneumatic long bones?

Neophron

Hemidactylus

Macropus

Ornithorhynchus

16 / 50

Erythropoietin hormone which stimulates R.B.C. formation is produced by:

Alpha cells of pancreas

The cells of rostral adenohypophysis

The cells of bone marrow

Juxtaglomerular cells of the kidney

17 / 50

Match the following:

	List – I		List – II
a	Physalia	i	Pearl oyster
b	Limulus	ii	Portuguese Man of War
c	Ancylostoma	iii	Living fossil
d	Pinctada	iv	Hookworm

Choose the correct answer from the options given below.

(a) (b) (c) (d) : (ii) (iii) (i) (iv)

(a) (b) (c) (d):(iv) (i) (iii) (ii)

(a) (b) (c) (d):(ii) (iii) (iv) (i)

(a) (b) (c) (d):(i) (iv) (iii) (ii)

18 / 50

During the process of gene amplification using PCR,if very high temperature is not maintained in thebeginning, then which of the following steps of PCRwill be affected first?

Annealing

Extension

Denaturation

Ligation

19 / 50

Which of the following statements wrongly represents the nature of smooth muscle?

These muscle have no striations

They are involuntary muscles

Communication among the cells is performed by intercalated discs

These muscles are present in the wall of blood vessels

20 / 50

The organelles that are included in the endomembrane system are

Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes

Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles

Golgi complex, Mitochondria, Ribosomes and Lysosomes

Golgi complex, Endoplasmic reticulum, Mitochondria and Lysosomes

21 / 50

Match List-I with List-II

	List – I		List – II
a	Aspergillus niger	i	Acetic Acid
b	Acetobacter aceti	ii	Lactic Acid
c	Clostridium butylicum	iii	Citric Acid
d	Lactobacillus	iv	Butyric Acid

Choose the correct answer from the options given below.

(a) (b) (c) (d) : (iii) (i) (iv) (ii)

(a) (b) (c) (d):(i) (ii) (iii) (iv)

(a) (b) (c) (d):(ii) (iii) (i) (iv)

22 / 50

For effective treatment of the disease, early diagnosis and understanding its pathophysiology is very important. Which of the following molecular diagnostic techniques is very useful for early detection?

Western Blotting Technique

Southern Blotting Technique and ELISA Technique

Blotting Technique

Hybridization Technique

23 / 50

Which of the following characteristics is incorrect with respect to cockroach?

A ring of gastric caeca is present at the junction of midgut and hind gut

Hypopharynx lies within the cavity enclosed by the mouth parts.

In females, 7th-9th sterna together form a genital pouch

10th abdominal segment in both sexes, bears a pair of anal cerci

24 / 50

Persons with ‘AB’ blood group are called as “Universal recipients”. This is due to :

Absence of antigens A and B on the surface of RBCs

Absence of antigens A and B in plasma

Presence of antibodies, anti-A and anti-B, on RBCs

Absence of antibodies, anti-A and anti-B, in plasma

25 / 50

Dobson units are used to measure thickness of:

CFCs

Stratosphere

Ozone

Troposphere

26 / 50

Read the following statements

(a) Metagenesis is observed in Helminths.
(b) Echinoderms are triploblastic and coelomate animals.
(c) Round worms have organ-system level of body organization.
(d) Comb plates present in ctenophores help in digestion.
(e) Water vascular system is characteristic of Echinoderms.

Choose the correct answer from the options given below

(c), (d) and (e) are correct

(a), (b) and (c) are correct

(a), (d) and (e) are correct

(b), (c) and (e) are correct

27 / 50

In a cross between a male and female, both heterozygous for sickle cell anaemia gene, what percentage of the progeny will be diseased?

50%

75%

25%

100%

28 / 50

Which enzyme is responsible for the conversion of inactive fibrinogens to fibrins?

Thrombin

Renin

Epinephrine

Thrombokinase

29 / 50

Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

High pO₂, low pCO₂, less H⁺, lower temperature

Low pO₂, high pCO₂, more H⁺, higher temperature

High pO₂, high pCO₂, less H⁺, higher temperature

Low pO₂, low pCO₂, more H⁺, higher temperature

30 / 50

Sphincter of oddi is present at:

Ileo-caecal junction

Junction of hepato-pancreatic duct and duodenum

Gastro-oesophageal junction

Junction of jejunum and duodenum

31 / 50

Which stage of meiotic prophase shows terminalisation of chiasmata as its distinctive feature?

Leptotene

Zygotene

Diakinesis

Pachytene

32 / 50

Which of the following is not an objective of Biofortification in crops?

Improve protein content

Improve resistance to diseases

Improve micronutrient and mineral content

33 / 50

The partial pressures (in mm Hg) of oxygen (O₂) and carbon dioxide (CO₂) at alveoli (the site of diffusion) are:

pO₂ = 104 and pCO₂ = 40

pO₂ = 40 and pCO₂ = 45

pO₂ = 95 and pCO₂ = 40

pO₂ = 159 and pCO₂ = 0.3

34 / 50

Veneral diseases can spread through :

(a) Using sterile needles
(b) Transfusion of blood from infected person
(c) Infected mother to foetus
(d) Kissing
(e) Inheritance

Choose the correct answer from the options given below

(a), (b) and (c) only

(b), (c) and (d) only

(b) and (c) only

(a) and (c) only

35 / 50

A specific recognition sequence identified by endonucleases to make cuts at specific positions within the DNA is:

Degenerate primer sequence

Okazaki sequences

Palindromic Nucleotide sequences

Poly(A) tail sequences

36 / 50

Which one of the following statements about Histones is wrong?

Histones are organized to form a unit of 8 molecules

The pH of histones is slightly acidic

Histones are rich in amino acids – Lysine and Arginine

Histones carry positive charge in the side chain

37 / 50

During muscular contraction which of the following events occur?

(a) ‘H’ zone disappears
(b) ‘A’ band widens
(c) ‘I’ band reduces in width
(d) Myosine hydrolyzes ATP, releasing the ADP and Pi.
(e) Z-lines attached to actins are pulled inwards.

Choose the correct answer from the options given below:

(a), (c), (d), (e) only

(b), (c), (d), (e) only

(a), (b), (c), (d) only

(b), (d), (e), (a) only

38 / 50

Match List-I with List-I

	List – I		List – II
a	Scapula	i	Cartilaginous joints
b	Cranium	ii	Flat bone
c	Sternum	iii	Fibrous joints
d	Vertebral column	iv	Triangular flat bone

Choose the correct answer from the options given below

(a) (b) (c) (d) : (i) (iii) (ii) (iv)

(a) (b) (c) (d) : (ii) (iii) (iv) (i)

(a) (b) (c) (d) : (iv) (ii) (iii) (i)

(a) (b) (c) (d) : (iv) (iii) (ii) (i)

39 / 50

Which of these is not an important component of initiation of parturition in humans ?

Increase in estrogen and progesterone ratio

Release of Oxytocin

Synthesis of prostaglandins

Release of Prolactin

40 / 50

Assertion (A):

A person goes to high altitude and experiences ‘altitude sickness’ with symptoms like breathing difficulty and heart palpitations.

Reason (R):

Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen. In the light of the above statements, choose the correct answer from the options given below

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true but (R) is not the correct explanation of (A)

(A) is false but (R) is true

(A) is true but (R) is false

41 / 50

Following are the statements with reference to ‘lipids’.

(a) Lipids having only single bonds are called unsaturated fatty acids
(b) Lecithin is a phospholipid.
(c) Trihydroxy propane is glycerol.
(d) Palmitic acid has 20 carbon atoms including carboxyl carbon.
(e) Arachidonic acid has 16 carbon atoms.

Choose the correct answer from the options given below.

(a) and (b) only

(c) and (d) only

(b) and (c) only

(b) and (e) only

42 / 50

The Adenosine deaminase deficiency results into

Dysfunction of Immune system

Parkinson’s disease

Digestive disorder

Addison’s disease

43 / 50

Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?

Graafian follicle

Corpus luteum

Foetus

Uterus

44 / 50

Identify the types of cell junctions that help to stop the leakage of the substances across a tissue and facilitation of communication with neighbouring cells via rapid transfer of ions and molecules.

Gap junctions and Adhering junctions, respectively

Tight junctions and Gap junctions, respectively

Adhering junctions and Tight junctions, respectively.

Adhering junctions and Gap junctions, respectively

45 / 50

Which of the following is not a step in Multiple Ovulation Embryo Transfer Technology (MOET)?

Cow is administered hormone having LH like activity for super ovulation

Cow yields about 6-8 eggs at a time

Cow is fertilized by artificial insemination

Fertilized eggs are transferred to surrogate mothers at 8-32 cell stage

46 / 50

Match List-I with List-II

	Column – I		Column – II
a	Filariasis	i	Haemophilus influenzae
b	Amoebiasis	ii	Trichophyton
c	Pneumonia	iii	Wuchereria bancrofti
d	Ringworm	iv	Entamoeba histolytica

Choose the correct answer from the options given below

(a) (b) (c) (d) : (iv) (i) (iii) (ii)

(a) (b) (c) (d) : (iii) (iv) (i) (ii)

(a) (b) (c) (d) : (i) (ii) (iv) (iii)

(a) (b) (c) (d) : (ii) (iii) (i) (iv)

47 / 50

Match List-I with List – II

	List – I		LIST – II
a	Allen’s Rule	i	Kangaroo rat
b	Physiological adaptation	ii	Desert lizard
c	Behavioural adaptation	iii	Marine fish at depth
d	Biochemical adaptation	iv	Polar seal

Choose the correct answer from the options given below.

(a) (b) (c) (d) : (iv) (ii) (iii) (i)

(a) (b) (c) (d) : (iv) (i) (iii) (ii)

(a) (b) (c) (d) : (iv) (i) (ii) (iii)

(a) (b) (c) (d) : (iv) (iii) (ii) (i)

48 / 50

Match List – I with List – II

	Column – I		Column – II
a	Adaptive radiation	i	Selection of resistant varieties due to excessive use of herbicides and pesticides
b	Convergent evolution	ii	Bones of forelimbs in Man and Whale
c	Divergent evolution	iii	Wings of Butterfly and Bird
d	Evolution by anthropogenic action	iv	Darwin Finches

Choose the correct answer from the options given below.

(a) (b) (c) (d) : (iv) (iii) (ii) (i)

(a) (b) (c) (d) : (iii) (ii) (i) (iv)

(a) (b) (c) (d) : (ii) (i) (iv) (iii)

(a) (b) (c) (d) : (i) (iv) (iii) (ii)

49 / 50

Statement I: The codon ‘AUG’ codes for methionine and phenylalanine.
Statement II:’AAA’ and ‘AAG’ both codons code for the amino acid lysine.

In the light of the above statements, choose the correct answer from the options given below

Statement 1 and Statement 2 is true

Statement 1 and Statement 2 both are false

Statement 1 is correct and Statement 2 is false

Statement 1 is incorrect and Statement 2 is true

50 / 50

Following are the statements about prostomium of earthworm.

(a) It serves as a covering for mouth.
(b) It helps to open cracks in the soil into which it can crawl.
(c) It is one of the sensory structures
(d) It is the first body segment

choose the correct answer from below

(a), (b) and (c) are correct

(a), (b) and (d) are correct

(a), (b), (c) and (d) are correct

(b) and (c) are correct

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