PrepBharat

1. Which of the following is correct about secondary structure?

a) Helix is a primary structure.
b) In proteins only left handed helices are observed.
c) In proteins only right handed helices are observed.
d) none of these

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2. Which structure is absolutely necessary for the many biological activities of proteins?
a) 1°
b) 3°
c) 2°
d) 4°

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3. When an assembly of more than one polypeptide occurs then it is known as _____ structure of protein.
a) 1°
b) 2°
c) 3°
d) 4°

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4. Which of the following is correct about human Haemoglobin (Hb)?
a) Made up to 2- \[\alpha\] and 2- \[\beta\] subunits
b) Present in RBC
c) Use to carry \[O_{2}\] and \[CO_{2}\]
d) All of these

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5. Select the incorrect statement from the following:
a) Most of the enzymes are protein
b) ‘Hb’ is an example of quaternary structure of protein.
c) In the primary structure of protein, the left hand is N-terminal and the right hand is C-terminal.
d) In protein or polypeptide, the amino acids are linked by glycosidic bond.

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6. Which of the following possess heterocyclic ring?
a) Adenine
b) Guanine and Cytosine
c) Thymine and Uracil
d) All of these

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7. Identify the nucleoside from the following:
A. Adenosine
B. Uridylic acid
C. Uridine
D. Cytidylic acid
a) A and B only
b) A and C only
c) C and D only
d) B and C only

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8. Which of the following acts as a genetic material?
a) DNA and RNA
b) Uridylic acid
c) Adenylic acid
d) Guanylic acid

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9. Sugar + Nitrogen bases form
a) Nucleoside
b) Nucleotide
c) Peptide
d) Glycoside

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10. Sugar + Nitrogen bases + Phosphate forms
a) Nucleoside
b) Nucleotide
c) Peptide
d) Glycoside

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