Biology · Chemistry

Carbohydrates and Biomolecules

1,073 Questions

Carbohydrates and biomolecules questions test your understanding of sugars, monosaccharides, and metabolic substrates. The topic covers food transportation in plants and the biochemical properties of sweeteners. Practicing these questions builds a strong foundation for exam preparation.

Disaccharides and monosaccharidesArtificial sweetenersGlycogen storagePlant food transportGlycoprotein hormones

Carbohydrates and Biomolecules Questions

Multiple choice
  1. Only P

  2. Only Q

  3. Only R

  4. P and Q

  5. Q and R

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

P. Sucralose is a trichloro derivative of sucrose. Its appearance and taste is like sugar. Its sweetness value is 600. Q. Aspartame is a methyl ester of dipeptide formed from aspartic acid and phenylalanine. Its sweetness value is 100. R. Acesulfame-K is a synthetic compound that acts as a synergist with other sweeteners. Its sweetness value is 200.

Multiple choice
  1. acesulfame-K, sucralose

  2. sorbitol, xylitol

  3. alitame, xylitol

  4. saccharin, sorbitol

  5. sorbitol, acesulfame-K

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

An artificial sweetener is a sugar substitute and chemically synthesized. These are added to some foods to make them taste sweet. For e.g.,  acesulfame-K, sucralose, alitame, saccharin, etc. Xylitol is a white odourless crystalline powder that has been used as a sweetening agent in food for over 40 years. The substance occurs naturally in many fruits and vegetables. Sorbitol occurs naturally in various fruits and berries. First discovered in 1872, it is today commercially produced by the hydrogenation of glucose and is available in both liquid and crystalline form. Since xylitol and sorbitol occur naturally, they represent natural sweetener agents.

Multiple choice
  1. Only A

  2. Only B

  3. Only C

  4. A and B

  5. B and C

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Aspartame is a dipeptide. It is a compound of two amino acids joined together (aspartic acid and phenylalanine). Only a very small amounts are needed for sweetening purposes. Ortho-sulphobenzimide, also called saccharin, is the first popular artificial sweetening agent. Sucralose is a trichloro derivative of sucrose.

Multiple choice
  1. A is true but B is false.

  2. A is false but B is true.

  3. Both A and B are true.

  4. Both A and B are false.

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Sucralose is a trichloro derivative of sucrose. Its appearance and taste are like sugar. It is stable at cooking temperature. It does not provide calories and thus, used in the making of sweets for diabetic patients.

Multiple choice
  1. pentadin and xylitol

  2. glucin and dulcin

  3. alitame and sucralose

  4. sucralose and xylitol

  5. glucin and pentadin

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A sugar substitute is a food additive that duplicates the effect of sugar in taste,. Some sugar substitutes are natural and some are synthetic. Those that natural are in general, called natural sweeteners. Examples are - Pentadin, xylitol,  etc. Those that are not natural and obtained by artificially, in general are called artificial sweeteners. Examples are - alitame, sucralose, glucin, dulcin, etc.

Multiple choice
  1. Only P

  2. Only Q

  3. Only R

  4. P and Q

  5. Q and R

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

P. Thaumatin is a low-calorie sweetener and flavour modifier. The thaumatins were first found as a mixture of proteins isolated from the katemfe fruit (Thaumatococcus daniellii Bennett) of west Africa. Its sweetness value is 2000. Q. A mogroside is a compound, and constitutes of glycoside of cucurbitane derivatives. They are found in certain plants, such as the fruit of the gourd vine (Siraitia grosvenorii). Its sweetness value is 300. R. Curculin is a sweet protein that was discovered and isolated in 1990 from the fruit of Curculigo latifolia. It has a  sweetness value of 550. Mabinlins are sweet-tasting proteins extracted from the seed of Mabinlang (Capparis masaikai Levl.). Mabinlin has the sweetness value of 100.

Multiple choice
  1. An organic base for the manufacture of paints

  2. A disease caused due to the deficiency of carbohydrates

  3. A type of plants found in high altitudes

  4. A group of enzymes essential for break down of carbohydrates

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Amylase is an enzyme that breaks down carbohydrates into simpler sugars like maltose. It is produced in the salivary glands and pancreas, playing a crucial role in digestion by converting starch into sugars that the body can absorb. Option A incorrectly identifies it as a chemical base for paints, while B wrongly calls it a disease, and C is unrelated.

Multiple choice
  1. Glucose and lactose

  2. Frutose and glucose

  3. Lactose and frutose

  4. Galiatose and frutose

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Honey primarily contains two simple sugars: fructose (about 38%) and glucose (about 31%). Lactose is milk sugar, galactose is another monosaccharide but not typically listed as a main component of honey.

Multiple choice
  1. A tetrose sugar

  2. A pentose sugar

  3. A hexose sugar

  4. A triose sugar

  5. None of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation