Entry Test MCQ :: Chromosome and DNA
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1. |
Which is incorrect? |
A. |
Chromosomes 1st observed by walther Fleming |
B. |
Chromosomal theory of inheritance 1st formulated by Walter Sutton |
C. |
1st evidence of hereditary nature of DNA provided by Friedrich Meischer |
D. |
Sex chromosomes discovered by Thomas Hunt Morgan |
Answer: Option C
Explanation:
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2. |
Chromosome is made of |
A. |
2 chromatids +1 centromere +secondary constriction |
B. |
1 chromated + 1 centromere + primary constriction |
C. |
2 chromatids + 1 centromere + primary constriction |
D. |
2 chromatids + 2 centromere + secondary constriction |
Answer: Option A
Explanation:
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3. |
Chromosomes are composed of |
A. |
40% protein and 60% DNA |
B. |
50% protein and 50% DNA |
C. |
70% protein and 30% DNA |
D. |
60% protein and 40% DNA |
Answer: Option D
Explanation:
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4. |
A typical human chromosome contains _________ nucleotides in its DNA |
A. |
240 million |
B. |
140 million |
C. |
150 million |
D. |
160 million |
Answer: Option B
Explanation:
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5. |
Histones have abundance of amino acids |
A. |
Valine and lysine |
B. |
Arginine and lysine |
C. |
Valine and arginine |
D. |
Histidione and threonine |
Answer: Option B
Explanation:
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6. |
A tortion of chromatin that is condensed only during cell division is |
A. |
Euchromatin |
B. |
Heterochromatin |
C. |
Biochromatin |
D. |
Nucleochromatin |
Answer: Option A
Explanation:
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7. |
Transfer of genetic material from one cell to another that can alter the genetic makeup of recipient cell is called |
A. |
Mutation |
B. |
Transuction |
C. |
Replication |
D. |
Variation |
Answer: Option B
Explanation:
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8. |
Who discovered DNA? |
A. |
P.A.Levene |
B. |
Frederick Griffith |
C. |
Friedrich Miescher |
D. |
Rosalind Franklin |
Answer: Option C
Explanation:
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9. |
DNA contains |
A. |
Purines (A and G) pyrimidines (U and (c) |
B. |
Purines (T and (c) pyrimidines (A and G) |
C. |
Purines (A and (c) pyrimidines (U and G) |
D. |
Purines (A and G) pyrimidines (T and (c) |
Answer: Option D
Explanation:
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10. |
In DNA |
A. |
A forms two bonds with T |
B. |
G forms three bonds with C |
C. |
A forms three bonds with T |
D. |
Both a and b |
Answer: Option D
Explanation:
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