Practice free Zoology NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Which one of the following common sexually transmitted diseases is completely curable when detected early and treated properly?
Gonorrhoea (bacterial) is fully curable with antibiotics; the others are viral and non-curable.
Statement I: In prokaryotes, the positively charged DNA is held with some negatively charged proteins in a region called nucleoid. Statement II: In eukaryotes, the negatively charged DNA is wrapped around the positively charged histone octamer to form nucleosome.
Both statements are correct per NCERT — note that the textbook describes the unusual prokaryotic DNA charge as stated.
Statement I: RNA mutates at a faster rate. Statement II: Viruses having RNA genome and shorter life span mutate and evolve faster.
RNA lacks proof-reading; RNA viruses (e.g., influenza, HIV) evolve rapidly.
Radial symmetry is NOT found in adults of phylum _____.
Hemichordates are bilaterally symmetrical as adults; the others are radial.
Which of the following are NOT considered as the part of endomembrane system?
A. Mitochondria B. Endoplasmic Reticulum C. Chloroplasts D. Golgi complex E. Peroxisomes
Endomembrane = ER, Golgi, lysosomes, vacuoles. Mitochondria, chloroplasts, peroxisomes are NOT part of it.
Match List I (Type of Joint) with List II (Found between):
| List I | List II |
|---|---|
| A. Cartilaginous Joint | I. Between flat skull bones |
| B. Ball and Socket Joint | II. Between adjacent vertebrae in vertebral column |
| C. Fibrous Joint | III. Between carpal and metacarpal of thumb |
| D. Saddle Joint | IV. Between Humerus and Pectoral girdle |
Cartilaginous → between vertebrae; Ball & socket → shoulder; Fibrous → skull; Saddle → carpal/metacarpal of thumb.
Match List I with List II with respect to human eye/hormones:
| List I | List II |
|---|---|
| A. CCK | I. Kidney |
| B. GIP | II. Heart |
| C. ANF | III. Gastric gland |
| D. ADH | IV. Pancreas |
CCK → Pancreas; GIP → Gastric gland; ANF → Heart (atrial source); ADH → Kidney.
Statement I: Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat. Statement II: When the inhibitor closely resembles the substrate in its molecular structure and inhibits the activity of the enzyme, it is known as competitive inhibitor.
Standard NCERT facts; both true.
Statement I: A protein is imagined as a line, the left end represented by first amino acid (C-terminal) and the right end represented by last amino acid (N-terminal). Statement II: Adult human haemoglobin consists of 4 subunits (two subunits of α type and two subunits of β type).
I wrong (left = N-terminal, right = C-terminal). II correct (HbA = α₂β₂).
A: Nephrons are of two types: Cortical & Juxta medullary, based on their relative position in cortex and medulla. R: Juxta medullary nephrons have short loop of Henle whereas cortical nephrons have longer loop of Henle.
A correct. R is reversed — juxtamedullary have LONG loop of Henle, cortical have short.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.