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Nucleic acidds p1

Total questions: 13

Worksheet time: 7mins

Name
Class
Date
1.

It is an unbranched polymer in which the monomer units are nucleotides.

a)

Nucleotides

b)

Nucleosides

c)

Nucleic acids

d)

Nucleus

e)

Proteins

2.

It is a 3-subunit molecule in which a pentose sugar is bonded to a phosphate group and a nitrogen containing heterocyclic base.

a)

Nucleoside

b)

Nucleotide

c)

Nucleic acid

d)

Nucleus

e)

Proteins

3.

What sugar unit is present in RNA nucleotides?

a)

B-D-Ribose

b)

B-D-2'-Deoxyribose

c)

A-D-Ribose

d)

A-D-2'-Deoxyribose

e)

B-D-Ribulose

4.

Which of the following nitrogen containing heterocyclic base is/are pyrimidine derivative(s)?

a)

Uracil

b)

Cytosine

c)

Adenine

d)

Guanine

e)

Thymine

5.

Which of the following nitrogenous containing heterocyclic base is only found in the DNA?

a)

Adenine

b)

Thymine

c)

Uracil

d)

Adenine

e)

Guanine

6.

Pentose sugar + Nitrogenous base= ?

a)

Protein

b)

Nucleic acid

c)

Nucleoside

d)

Nucleotide

e)

Nucleus

7.

Provide a name for the following nucleoside formation:

Deoxyribose sugar + Adenine

a)

Deoxyadenosine

b)

Adenosine

c)

Deoxyadidine

d)

Adidine

e)

Deoxyguanosine

8.

Provide a name for the following nucleoside formation:

Ribose sugar + Guanine

a)

Deoxyguanosine

b)

Deoxyadenosine

c)

Cytidine

d)

Guanosine

e)

Thymidine

9.

How are nucleotides linked to form the nucleic acid structure?

a)

Pentose sugar-pentose sugar bonds

b)

base-base bonds

c)

Pentose sugar-base bonds

d)

Phosphate-base bonds

e)

Pentose sugar-phosphate bonds

10.

How many polynucleotide strands are present in the DNA?

a)

0

b)

1

c)

2

d)

3

e)

4

11.

These are pairs of bases in a nucleic acid structure that can hydrogen-bond to each other.

a)

Complementary base

b)

Complementary strand

c)

Complementary dietary protein

d)

Base stacking interactions

e)

Double helix

12.

What is/are the primary reason(s) for base pairing in DNA?

(for example, why Thymine is always paired with Adenine)

a)

Lock and key model

b)

Number of hydrogen bonding

c)

Directionality

d)

Type of bonding

e)

Molecular structure of the base

13.

Find the complement to this short DNA strand.

TGC ATT

a)

TCG ATT

b)

ACG TAA

c)

AGC TAA

d)

ACG ATT

e)

TGC TAA

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