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 zoology insects and human welfare bee keeping apiculture apiculture, sericulture and fisheries

Honey mainly consists of ........................

  1. Monosaccharides

  2. Disaccharides

  3. Polysaccharides

  4. Fats
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Honey is composed primarily of the sugars glucose and fructose; its third greatest component is water. It consists of fructose (45%) and glucose (32-37%) that is monosaccharides and because of glucose and fructose, they gets its sweetness. Hence, option A is correct.

Multiple choice zoology insects and human welfare bee keeping apiculture apiculture, sericulture and fisheries

Honey mainly consists of___________.

  1. Monosaccharides

  2. Disaccharides

  3. Polysaccharides

  4. Fats
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A mixture of monosaccharids sugars and other carbohydrates, Honey is mainly fructose(about $38\%$) and glucose(about $32\%$), with remaining sugars including maltose, Sucrose and other complex carbohydrates. It's glycemic index ranges from $31$ to $8$, depending on the variety.

Multiple choice zoology insects and human welfare bee keeping apiculture apiculture, sericulture and fisheries

In honey the percentage of maltose and other sugar is ...........%

  1. 9.2

  2. 8.81

  3. 10.5

  4. 11.2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Honey is mainly consists of fructose (about 38-55%) and glucose (about 31%), with remaining sugars including maltose, sucrose, and other complex carbohydrates. Maltose, sucrose and other sugars accounts for 8.8%. Hence, option B is correct.

Multiple choice bio-chemistry digestion digestive system - organs process of digestion coordination in the process of digestion

If you chew on a piece of bread long enough, it will begin to taste sweet because

  1. Maltase is breaking down maltose

  2. Lipases are forming fatty acids

  3. Amylase is breaking down starches to disaccharides

  4. Disaccharides are forming glucose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Amylase is a digestive enzyme that acts on starch in food, breaking it down into smaller carbohydrate molecules. It is produced at two sites. First, salivary glands in the mouth make salivary amylase, which begin the digestive process by breaking down starch when the food is chewed. The starch is converted to maltose, a smaller carbohydrate. When starchy foods like rice or potatoes begin to break down in the mouth, a slightly sweet taste is detected, as maltose is released. So, if we chew a piece of bread (made of polysaccharides) long enough, it will begin to taste sweet because amylase is breaking down starches to dissaccharides such as maltose. Thus, option C is correct.

Multiple choice biology digestive system of human digestive glands liver pancreas

Meat does not contain much glycogen because 

  1. It is stored only in liver

  2. Animals do not store much glycogen

  3. It is degraded by enzymes immediately after death

  4. Clinical death is not biological death
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Meat does not contains much of glycogen as all the excess glucose present in body is converted to glycogen and is stored in the liver.
Some of the glycogen is stored in muscle but is as less as $1-2\%$. Major portion, i.e., $100-120$gm of glycogen is stored in liver cells and are released and broken down when needed.
Multiple choice biology digestive system of human digestive glands liver pancreas

In which of the form is glucose stored in liver 

  1. Cellulose

  2. Glycogen

  3. Starch

  4. Sucrose.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

All animals and humans store some glucose in the cells so that it is available for quick shots of energy. When there is excess of glucose in the body, it is stored in the liver as the large compound called glycogen. when there is demand for glucose then it is break down their stored glycogen into glucose and send it through the blood stream as fuel for other organs.

So, the correct answer is option B.

Multiple choice botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

This is a complex, non-carbohydrate polymer found in cell walls Its function is to provide stiffening to the cell as in xylem vessels and bark fibres. Name it

  1. Opsonin

  2. Saponin

  3. Lignin

  4. Plant Polypeptide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Lignin is a class of complex organic polymers that form key structural materials in the support tissues of vascular plants and some algae. Lignins are particularly important in the formation of cell walls, especially in wood and bark, because they lend rigidity and do not rot easily. Chemically, lignins are cross-linked phenolic polymers. As a biopolymer, lignin is unusual because of its heterogeneity and lack of a defined primary structure. Its most commonly noted function is the support through strengthening of wood (mainly composed of xylem cells and lignified sclerenchyma fibres) in vascular plants.

So the correct option is 'lignin'.

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Which of the following is a group of end products of carbohydrate digestion?

  1. Glucose, galactose, maltose

  2. Sucrose, galactose, maltose

  3. Galactose, glucose, fructose

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The end product of carbohydrate digestion is mainly glucose together with some fructose and galactose (monosaccharide). 

Multiple choice biology digestion and absorption digestion in small intestine digestive glands and their secretions alimentary canal

Which of the following type of enzyme is not matched correctly with the molecule that it breaks down?

  1. Amylase- Starch

  2. Lipase- Starch

  3. Protease- Proteins

  4. Disaccharidase- Sugars
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lipases are enzymes found in the small intestine of humans that helps in the breakdown of fats. it is not involved in the digestion of starch.