Chemical Constituents of Living Cells : Biomolecules-Structure and Function of Proteins, Carbodydrates, Lipids, Nucleic Acids; Enzymes-types, Properties, Enzyme Action, Classification and Nomenclature of Anzymes NEET Questions

Biology - Cell Structure and Function

Chemical Constituents of Living Cells : Biomolecules-Structure and Function of Proteins, Carbodydrates, Lipids, Nucleic Acids; Enzymes-types, Properties, Enzyme Action, Classification and Nomenclature of Anzymes MCQ Questions


1.
What is meant by acid-soluble pool of a cell?
A.
Inorganic salts only
B.
Insoluble residue
C.
Pool of large molecules in trichloroacetic acid
D.
Pool of small molecular weight compounds (under 1000 Da) in TCA-soluble fraction
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ANSWER :
D. Pool of small molecular weight compounds (under 1000 Da) in TCA-soluble fraction
2.
Macromolecules of biological systems are typically:
A.
Always less than 500 Daltons
B.
Above 10,000 Daltons (in acid-insoluble fraction)
C.
Below 1000 Daltons
D.
Below 100 Daltons
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ANSWER :
B. Above 10,000 Daltons (in acid-insoluble fraction)
3.
Lipids appear in the acid-insoluble fraction because:
A.
Their molecular weights are usually below 800 Da, but they form membrane structures that get filtered with macromolecules
B.
They are nucleic acids
C.
They are amino acids
D.
They have very high molecular weight
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ANSWER :
A. Their molecular weights are usually below 800 Da, but they form membrane structures that get filtered with macromolecules
4.
Which of the following is the most abundant chemical in living organisms?
A.
Water
B.
Lipids
C.
Carbohydrates
D.
Proteins
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ANSWER :
A. Water
5.
The percentage of carbon in a typical living tissue is approximately:
A.
18%
B.
65%
C.
6.5%
D.
1%
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ANSWER :
A. 18%
6.
Amino acids contain which functional groups?
A.
Amino group, carboxyl group, hydrogen, and R-group (variable)
B.
Only amino group
C.
Only R-group
D.
Only carboxyl group
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ANSWER :
A. Amino group, carboxyl group, hydrogen, and R-group (variable)