Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which one of the following enzymes contains 'Haem' as the prosthetic group?
Catalase is a haem-containing enzyme (the prosthetic group is haem). Carbonic anhydrase uses zinc, and succinate dehydrogenase uses FAD/Fe-S clusters.
Neoplastic characteristics of cells refer to: A. A mass of proliferating cell B. Rapid growth of cells C. Invasion and damage to the surrounding tissue D. Those confined to original location Choose the correct answer:
Neoplastic (cancerous) cells form a proliferating mass (A), grow rapidly (B) and invade/damage surrounding tissue (C). Being confined to one location (D) describes benign, not neoplastic, growth.
Given below are two statements:
Statement I: The DNA fragments extracted from gel electrophoresis can be used in construction of recombinant DNA.
Statement II: Smaller size DNA fragments are observed near anode while larger fragments are found near the wells in an agarose gel.
In the light of the above statements, choose the most appropriate answer:
Eluted DNA fragments can be used in rDNA construction (I correct). In agarose gel, smaller fragments travel farther toward the anode while larger ones stay near the wells (II correct).
Match List I with List II:
List I — A. Adenosine, B. Adenylic acid, C. Adenine, D. Alanine
List II — I. Nitrogen base, II. Nucleotide, III. Nucleoside, IV. Amino acid
Choose the option with all correct matches:
Adenosine = nucleoside (III); Adenylic acid (AMP) = nucleotide (II); Adenine = nitrogen base (I); Alanine = amino acid (IV).
Consider the following: A. The reductive division for the human female gametogenesis starts earlier than that of the male gametogenesis. B. The gap between the first meiotic division and the second meiotic division is much shorter for males compared to females. C. The first polar body is associated with the formation of the primary oocyte. D. Luteinizing Hormone (LH) surge leads to disintegration of the endometrium and onset of menstrual bleeding. Choose the correct answer:
In females meiosis begins during foetal life — earlier than in males (A true) — and is arrested for years, so the gap is far longer than in males (B true). The first polar body forms when the secondary oocyte is produced (C false); the LH surge triggers ovulation, not menstruation (D false).
All living members of the class Cyclostomata are:
All living cyclostomes (e.g. lampreys) are ectoparasites on fishes.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.
Reason (R): Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus.
Choose the correct answer:
The Golgi packages and dispatches ER products (A true); materials enter at the cis face and leave, after modification, from the trans face (R true), which correctly explains A.
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): All vertebrates are chordates but all chordates are not vertebrate.
Reason (R): The members of subphylum vertebrata possess notochord during the embryonic period; the notochord is replaced by a cartilaginous or bony vertebral column in adults.
Choose the correct answer:
Vertebrates are a subphylum of chordates, so all vertebrates are chordates but not vice versa (A true). Their embryonic notochord is replaced by a vertebral column (R true) — R explains why vertebrates are a specialised chordate group.
Identify the statement that is NOT correct.
The antigen-binding site lies in the variable region at the N-terminus, not the C-terminus, so statement C is not correct.
The first menstruation is called:
The first menstruation at puberty is called menarche; cessation of menstruation in mid-life is menopause.
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