Ribose and Deoxyribose

Q. The difference between a ribonucleotide and a deoxyribonucleotide is_____.

1. Deoxyribonucleotide has an α configuration; ribonucleotide has the β configuration; at C-1.

2. Ribonucleotide has an extra --OH at C-4.

3. Deoxyribonucleotide has an -- H instead of an --OH at C-2.

4. Ribonucleotide has more structural flexibility than deoxyribonucleotide.

Q. The difference between a ribonucleotide and a deoxyribonucleotide is_____.

1. Deoxyribonucleotide has an -- H instead of an --OH at C-2.
2. Deoxyribonucleotide has an $\alpha$ configuration; ribonucleotide has the $\beta$ configuration; at C-1.
3. Ribonucleotide has an extra --OH at C-4.
4. Ribonucleotide has more structural flexibility than deoxyribonucleotide.

Q. The pentose sugar in a nucleotide is in which of the following forms?

1. Furanose
2. Pyranose
3. Straight chain
4. Equilibrium between ring and straight chain forms

Q.

Mention an amide found in plants that forms a structural part of proteins.

Q. Removal of oxygen from the of the ribose sugar gives rise to a deoxyribose sugar molecule.

1. 1'-C
2. 2'-C
3. 3'-C
4. 5'-C

Q.

Does DNA ligase require ATP?

Q. Sugar found in DNA is _______.

1. Dextrose
2. Levulose
3. Glucose
4. Deoxyribose

Q. Among nitrogen bases of nucleic acids, double ring is found in

1. Thymine
2. Cytosine
3. Uracil
4. Guanine

Q. Removal of oxygen from the of the ribose sugar gives rise to a deoxyribose sugar molecule.

1. 1'-C
2. 2'-C
3. 3'-C
4. 5'-C

Q. Phosphorus is constituent of

1. Carbohydrate
2. Protein
3. Fat
4. Nucleotide

Q. Which of the following nucleotide sequence contain 4 pyrimidine bases?

1. GCUAGACAA
2. GATCAATGC
3. UAGCGGUAA
4. BOTH a and c

Q.

Which purine base is found in RNA?

1. Thymine

2. Uracil

3. Cytosine

4. Guanine

Q. Sugar found in DNA is _______.

1. Levulose
2. Glucose
3. Deoxyribose
4. Dextrose

Q. Normally DNA molecule has A-T, G-C pairing. However, these bases can exist in alternative valency status, owing to rearrangements called as

1. Frame-shift mutation
2. Point mutation
3. Tautomerisational mutation
4. Analogue substitution

Q. In which of the following methyl group is present in the fifth position of heterocyclic carbon compound?

1. Cytosine
2. Thymine
3. Adenine
4. Guanine

Q. A nucleotide is

1. Sugar $+$ Phosphate
2. Base $+$ Sugar $+$ Phosphate
3. ${(Base+Sugar+Phosphate)}_n$
4. Base $+$ Sugar $-OH$

Q. Assertion :5-bromouracil can cause mutations. Reason: It is called as base analogue.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
3. Assertion is correct but Reason is incorrect.
4. Both Assertion and Reason are incorrect.