FSc Part 1 Biology chapter 12: Nutrition MCQs with answers

By Team Megalecture · Updated 4 Nov 2026

20 exam-style questions on Nutrition, each with the answer and a short explanation. Ten of them are below to try. The chapter test draws ten fresh questions each time and is marked the moment you finish, with your score by topic.

20 questions · 2 topics · 10 per test

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What chapter 12 covers

Ten Nutrition questions with answers

Try each one, then open the answer. These ten stay the same; the test draws new ones every time.

1. The Venus flytrap is

  1. A
    Cuscuta
  2. B
    Nepenthes
  3. C
    Drosera
  4. D
    Dionaea
Show answer

Answer: D. Dionaea has hinged leaf lobes that snap shut. Nepenthes is the pitcher plant; Drosera (sundew) uses sticky glandular hairs.

2. Nepenthes (a pitcher plant) grows in acidic bog soil that has almost no nitrate or ammonium. Its pitchers trap insects mainly to obtain

  1. A
    nitrogen compounds
  2. B
    oxygen for the roots
  3. C
    water for the leaves
  4. D
    extra carbohydrates for growth
Show answer

Answer: A. Insectivorous plants live in nitrogen-poor soil and digest insects to obtain nitrogen compounds. They still make their own carbohydrates by photosynthesis.

3. Bile helps in the digestion of fats by

  1. A
    converting fats into glycogen
  2. B
    absorbing fats into blood
  3. C
    emulsifying fats into small droplets
  4. D
    hydrolysing fats into fatty acids and glycerol
Show answer

Answer: C. Bile salts break large fat globules into tiny droplets, increasing the surface area for lipase. Bile contains no digestive enzymes.

4. In the cockroach, food is ground up by chitinous teeth in the

  1. A
    Malpighian tubules
  2. B
    gastric caeca
  3. C
    crop
  4. D
    gizzard
Show answer

Answer: D. The gizzard (proventriculus) grinds food. The crop stores food; gastric caeca secrete enzymes; Malpighian tubules excrete.

5. After absorption, fatty acids and glycerol are carried away from the villus mainly in the

  1. A
    lacteals
  2. B
    bile duct
  3. C
    blood capillaries
  4. D
    hepatic portal vein
Show answer

Answer: A. Fats are recombined and pass into the lacteal (lymph vessel). Glucose and amino acids enter blood capillaries and go to the liver.

6. A plant grown in a culture solution has stunted growth and pale, yellow older leaves while the youngest leaves stay green. It is most likely deficient in

  1. A
    calcium, needed for the middle lamella
  2. B
    nitrogen, needed for amino acids and chlorophyll
  3. C
    oxygen, needed for photolysis
  4. D
    iron, needed to make chlorophyll
Show answer

Answer: B. Nitrogen is mobile: the plant moves it from older to younger leaves, so old leaves turn yellow first and growth is stunted. Calcium and iron are not moved out of old leaves, so their deficiency shows first in young leaves.

7. The digestive system of Planaria has

  1. A
    a single opening and a branched intestine
  2. B
    a mouth and an anus joined by a straight tube
  3. C
    a crop, a gizzard and a pair of salivary glands
  4. D
    no gut, with food absorbed through the body surface
Show answer

Answer: A. Planaria has a muscular pharynx and a three-branched intestine with one opening; undigested food leaves through the mouth.

8. Trypsinogen from the pancreas is converted into active trypsin in the duodenum by

  1. A
    enterokinase from the duodenal wall
  2. B
    bile salts, released from the gall bladder
  3. C
    pepsin, carried in from the stomach
  4. D
    hydrochloric acid, carried in with the chyme
Show answer

Answer: A. Enterokinase (enteropeptidase), made by the lining of the duodenum, converts inactive trypsinogen into trypsin. Trypsin then activates other pancreatic enzymes.

9. Magnesium is essential to plants mainly because it

  1. A
    is the central atom of the chlorophyll molecule
  2. B
    forms the cell wall
  3. C
    is a component of all amino acids
  4. D
    is part of DNA
Show answer

Answer: A. Magnesium is the central atom of chlorophyll, so its deficiency causes chlorosis (yellowing).

10. Salivary amylase acts on

  1. A
    fats, forming fatty acids
  2. B
    maltose, forming glucose
  3. C
    proteins, forming peptides
  4. D
    starch, forming maltose
Show answer

Answer: D. Salivary amylase (ptyalin) begins starch digestion in the mouth, producing maltose.

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Ways to practise this chapter

Nutrition: questions students ask

How many Nutrition MCQs are there?

20, each with the answer and a short explanation, across 2 topics: Nutrition in plants and non-human animals, Digestion in humans and its disorders. Every chapter test draws ten of them, so you can take it many times.

Is the FSc Part 1 Biology chapter 12 test free?

Yes. The test, the answers and the explanations are free and need no sign-up. Sign in only if you want your scores kept across devices.

How is the chapter test marked?

The moment you press Finish: your score, the right answer and an explanation for every question, and the ones you got wrong saved in My mistakes to retry.

Can I read the explanations in Urdu?

Yes. In practice mode and on your results you can switch the explanations to Urdu.

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