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Biomolecules

One Word Answers

101. Name the substance that forms the exoskeleton of insects and prawns.

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Short Answer Type

102. What is meant by tertiary structure of proteins ?

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103. What are quarternary proteins ?

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104. All proteins are made up of same amino acids, explain how human protein may be different from those of a dog.

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105. How are complementary base pairs joined in a DNA double helix ?

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Long Answer Type

106. Differentiate between A, B, C, D and Z-DNAs in tabulated form.

Differences between A, B and Z-DNAs :

Characters

A-DNA

B-DNA

Z-DNA

1. Base pair per turn of the helix.

2. Tilt of base pairs

3. Axial rise (h)

4. Helical diameter (A)

5. Rotation of the double helix DNA.

20.2 Å

2.56 Å

23 Å

right handed

6.3 Å

3.37 Å

20 Å

right handed

7 Å

3.7Å

18Å

left handed

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107. Describe the types of proteins on the basis of composition.

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108. Describe the functions of proteins.

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109. Describe Watson and Crick model of DNA.

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Short Answer Type

110. What is RNA ? Describe its different forms.

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