NEET (Medical) Biology Mock Test
145 free timed sets · 7,181 questions · 5,517 easy / 1,209 moderate / 455 hard · solutions for every question
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Sample Biology questions
1. The powerhouse of the cell is:
- (A) Ribosome
- (B) Mitochondrion
- (C) Nucleus
- (D) Golgi body
Show answer
(B) Mitochondrion. Concept: Cell organelles and their functions; the mitochondrion is the site of aerobic respiration. Why B is correct: Mitochondria carry out the Krebs cycle and oxidative phosphorylation on their inner membrane (cristae), producing most of the cell's ATP — hence "powerhouse". Why others are wrong: - A) Ribosomes synthesise proteins. - C) Nucleus stores DNA and controls the cell. - D) Golgi body modifies, packages and secretes proteins/lipids. Remember: Mitochondria have their own circular DNA and 70S ribosomes (semi-autonomous, endosymbiotic origin), are maternally inherited, and are double-membraned like chloroplasts.
2. What kind of muscle cells have a single nucleus and are spindle-shaped?
- (A) cardiac muscle
- (B) smooth muscle
- (C) liquid muscle
- (D) skeletal muscle
Show answer
(B) smooth muscle. 10.8 Smooth Muscle Smooth muscle is found throughout the body around various organs and tracts. Smooth muscle cells have a single nucleus, and are spindle-shaped. Smooth muscle cells can undergo hyperplasia, mitotically dividing to produce new cells. The smooth cells are nonstriated, but their sarcoplasm is filled with actin and myosin, along with dense bodies in the sarcolemma to anchor the thin filaments and a network of intermediate filaments involved in pulling the sarcolemma toward the fiber’s middle, shortening it in the process. Ca++ ions trigger contraction when they are released from SR and enter through opened voltage-gated calcium channels. Smooth muscle contraction is initiated when the Ca++ binds to intracellular calmodulin, which then activates an enzyme called myosin kinase that phosphorylates myosin heads so they can form the cross-bridges with actin and then pull on the thin filaments. Smooth muscle can be stimulated by pacesetter cells, by the autonomic nervous system, by hormones, spontaneously, or by stretching. The fibers in some smooth muscle have latch-bridges, crossbridges that cycle slowly without the need for ATP; these muscles can maintain low-level contractions for long periods. Single-unit smooth muscle tissue contains gap junctions to synchronize membrane depolarization and contractions so that the muscle contracts as a single unit. Single-unit smooth muscle in the walls of the viscera, called visceral muscle, has a stress-relaxation response that permits muscle to stretch, contract, and relax as the organ expands. Multiunit smooth muscle cells do not possess gap junctions, and contraction does not spread from one cell to the next.
3. Which drug(s) is/are approved for the treatment of obesity in Europe?
- (A) Phentermine/Topiramate
- (B) Naltrexone/Bupropion
- (C) Orlistat
- (D) Lorcaserin
Show answer
(C) Orlistat. Correct answer: Orlistat.
NEET (Medical) Biology — FAQs
Is the NEET (Medical) Biology mock test free?
Yes. All 145 Biology sets are free, need no signup, and give instant scores with a solution for every question.
How many Biology questions are there for NEET (Medical)?
7,181 questions across 145 sets: 5,517 easy, 1,209 moderate and 455 hard.
Will I get the same questions again?
No. Each attempt draws a fresh random subset, shuffles the order and options, and prefers questions you have not seen on this device. The Surprise Set draws from the whole subject pool.
Can I choose difficulty and timer?
Yes — pick Easy, Moderate, Hard or Mixed, and choose no timer, 10 or 20 minutes, or the real exam pace.