Monosaccharides

Q. Why do DNA have beta deoxyribose and not alpha deoxyribose in its structure?

Q. Pentose sugars found in DNA and RNA respectively are

1. ribose and deoxyribose
2. deoxyribose and glucose
3. deoxyribose and erythrose
4. deoxyribose and ribose

Q.

Starch, cellulose, glycogen, chitin are polysaccharides found among the following. Choose the one appropriate and write against each.

Cotton fibre ...................

Exoskeleton of cockroach ..........

Liver ....................

Peeled potato ...................

Q. Pyruvic acid is the key product of glycolysis. What is the metabolic fate of pyruvate?

Q.

All the following are polysaccharides except:

1. Agar

2. Maltose

3. Cellulose

4. Heparin

Q. Which of the following carbohydrates is a triose?

1. Ribulose
2. Glucose
3. Glyceraldehyde
4. Ribose

Q. State the difference between:
(ii) Monosaccharide and disaccharide

Q. Monosaccharides are classified into trioses and tetroses based on

1. the number of carbon atoms
2. the number of sugar units
3. the number of hydroxyl groups
4. the number of hydrogen atoms

Q.

Both oligosaccharides and polysaccharides are formed from monosaccharide units involving glcocidic bond .Then why are pligosaccharides soluble in water but not the polysaccharides

Q. Which of the following carbohydrates is found inside the nucleus of a cell?

1. oligosaccharides
2. polysaccharides
3. monosaccharides
4. disaccharides

Q. Choose the simplest aldehyde and ketone carbohydrate pair.

1. glyceraldehyde and dihydroxyacetone
2. glucose and fructose
3. erythrose and erythrulose
4. ribose and ribulose

Q. Pentoses and hexoses are the most common:

1. Disaccharides
2. Monosaccharides
3. Polysaccharides
4. Oligosaccharides

Q.

Lactic acid is formed by the process of

1. Fermentation

2. Glycolysis

3. HMP Pathway

4. None of these

Q. Choose the simplest aldehyde and ketone carbohydrate pair.

1. glyceraldehyde and dihydroxyacetone
2. ribose and ribulose
3. erythrose and erythrulose
4. glucose and fructose

Q. Which among the following is a pentose?

1. Fructose
2. Erythrose
3. Glucose
4. Ribose

Q. During the formation of amides from amino acids-

1. $COOH$ part of acid is replaced by $N{H}_2$
2. $N{H}_2$ part of acid is replaced by $COOH$
3. $OH$ part of acid group is replaced by $N{H}_2$
4. $N{H}_2$ part of acid is replaced by $OH$

Q. Which of the following carbohydrates exist in both linear and cyclic forms?

1. Disaccharides
2. Polysaccharides
3. Oligosaccharides
4. Monosaccharides

Q. Which light range is least effective in photosynthesis?

1. Blue
2. Green
3. Violet
4. Red

Q. The pentose sugar present in RNA is

1. deoxyribose
2. ribose
3. galactose
4. fructose

Q.

Choose the sugars arranged in the ascending order of the number of carbon atoms they possess.

1. Tetrose, Hexose, Triose, Pentose

2. Triose, Pentose, Tetrose, Hexose

3. Triose, Tetrose, Pentose, Hexose

4. Hexose, Pentose, Tetrose, Triose

Q. Which among the following is a pentose?

1. Fructose
2. Glucose
3. Ribose
4. Erythrose

Q. Some enzymes are named after the reaction, where they are used. What name is given to the class of enzymes which catalyse the oxidation of one substrate with simultaneous reduction of another substrate.

Q.

The sweetest chemical is

1. Fructose

2. Saccharin

3. Thaumatin

4. Monellin

Q. An enzyme that can stimulate germination of barley seeds is:

1. Protease
2. $\alpha$-amylase
3. Invertase
4. Lipase

Q. Since respiration involves breakdown of substrates, the respiratory process has traditionally been considered a catabolic process and the respiratory pathway as a catabolic pathway. But is this understanding correct?

Q. Monosaccharides are classified into trioses and tetroses based on

1. the number of carbon atoms
2. the number of hydrogen atoms
3. the number of sugar units
4. the number of hydroxyl groups

Q.

Glycogen is a homopolymer made of

(a) glucose units (b) galactose units

(c) ribose units (d) amino acids

Q. Pentose sugars found in DNA and RNA respectively are

1. ribose and deoxyribose
2. deoxyribose and glucose
3. deoxyribose and erythrose
4. deoxyribose and ribose

Q. Pentoses and hexoses are the most common:

1. Disaccharides
2. Monosaccharides
3. Oligosaccharides
4. Polysaccharides

Q. Choose the correct option from the brackets:
(i) A simple sugar (glucose, maltose, sucrose, cellulose)