Molecular Basis Of Inheritance — DPP 13

17 NEET questions from Molecular Basis Of Inheritance, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
Triplet codon concept can be proved by
  1. A Wobble hypothesis
  2. B Transition
  3. C Transversion
  4. D Frame shift mutation
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Correct answer: D

2
Which suspect would you charge with the crime
Crime scene sample
Molecular Basis Of Inheritance – NEET-13381
  1. A Both suspect 1 and 2
  2. B Only suspect 1
  3. C Only suspect 2
  4. D Neither suspect 1 nor suspect 2
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Correct answer: B

3
If E.coli labelled by $\mathrm{N}^{15}$ allowed to grow for 60 minutes in a medium containing $\mathrm{N}^{14} \mathrm{H}_{4} \mathrm{Cl}$. What would be the proportion of light and hybrid densities DNA molecules?
  1. A $12 \cdot 5 \% \mathrm{~N}^{14} \mathrm{~N}^{14}, 87 \cdot 5 \% \mathrm{~N}^{15} \mathrm{~N}^{14}$
  2. B $75 \% \mathrm{~N}^{14} \mathrm{~N}^{14}, 25 \% \mathrm{~N}^{15} \mathrm{~N}^{14}$
  3. C $50 \% \mathrm{~N}^{14} \mathrm{~N}^{14}, 50 \% \mathrm{~N}^{15} \mathrm{~N}^{14}$
  4. D $93 \cdot 25 \% \mathrm{~N}^{14} \mathrm{~N}^{14}, 6 \cdot 75 \% \mathrm{~N}^{15} \mathrm{~N}^{14}$
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Correct answer: B

4
A normal man marries with a normal female. But the father of both of them were haemophilic which of the following statement is correct about their offsprings
  1. A 50% dayghters normal & 50% son are haemophilic
  2. B All the daughters are normal & 50% sons are haemophilic
  3. C 50% daughters may haemophilic & 50% sons are normal.
  4. D All the daughters are normal and all the son's are haemophilic
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Correct answer: B

5
Which of the following also confers additional stability to DNA
  1. A Adenine
  2. B Guanine
  3. C Thymine
  4. D Cytosine
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Correct answer: C

6
During translation in eukaryotes the anticodon to be aligned with the initiation codon is
  1. A $5 ^ { \prime } - \mathrm { UAC } - 3 ^ { \prime }$
  2. B $3 ^ { \prime } -$ UAC $- 5 ^ { \prime }$
  3. C $5 ^ { \prime }$ - UCA - 3'
  4. D $3 ^ { \prime } -$ CAU $- 5 ^ { \prime }$
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Correct answer: B

7
During elongation of polypeptide chain sigma factor is
  1. A Functionless
  2. B Retained for specific function
  3. C Released for re-use
  4. D Required during closing of chain
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Correct answer: A

8
Given below sequence of the processed $\mathrm { m } -$ RNA ready for translation:
5'AUG CUA UACCUCCUUUAUCUGUGA-3' How many different t-RNA molecule require to translate this m-RNA-
  1. A 8
  2. B 7
  3. C 6
  4. D 5
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Correct answer: B

9
A normal girl has colour blind brother which statement is true
  1. A Mother of them may be colour blind
  2. B Father of them should be normal
  3. C Mother of them should be normal
  4. D Father of them should be colour blind
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Correct answer: A

10
A segment of DNA that reads the same in forward and backward is called
  1. A palindromic DNA
  2. B plasminic DNA
  3. C complementary DNA
  4. D copy DNA
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Correct answer: A

11
The red flowered plants ( RR ) of Antirrhinum crossed with white flowered plant ( rr ) $\mathrm{F}_{1}$ generation produced bearing pink- flowered plants on selfing of $F_{1}$ generation $F_{2}$ generation obtained. In which the ratio of pink and red flowered plants will be.
  1. A $1: 2$
  2. B $1: 1$
  3. C $2: 1$
  4. D $3: 1$
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Correct answer: C

12
If one parent has blood group A and the other parent has blood group B. The offspring have which blood group
  1. A AB
  2. B O
  3. C BO
  4. D A, B, AB, O
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Correct answer: D

13
Due to high degree of polymorphism, size of VNTR varies from
  1. A $0.1 - 2 \mathrm {~kb}$
  2. B $0.1 - 20 \mathrm {~kb}$
  3. C $0.01 - 20 \mathrm {~kb}$
  4. D $0.1 - 200 \mathrm {~kb}$
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Correct answer: B

14
The length of DNA with 46 base pairs is
  1. A $156 \cdot 8 \mathrm {~A} ^ { \circ }$
  2. B $156 \cdot 4 \mathrm {~A} ^ { \circ }$
  3. C $156 \mathrm {~A} ^ { \circ }$
  4. D $149 \cdot 6 \mathrm {~A} ^ { \circ }$
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Correct answer: B

15
Transcriptional unit consists of
  1. A Template strand, $\alpha$ - factor \& $\rho$-factor
  2. B Promoter, structural gene, Terminator
  3. C Regulator gene, promoter gene, operator gene & structural gene
  4. D DNA template, RNA polymerase, Nitrogenous bases.
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Correct answer: B

16
Which type of DNA is found in bacteria.
  1. A Straight DNA
  2. B Helical DNA
  3. C Membrane bound DNA
  4. D Circular free DNA
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Correct answer: D

17
Find out the incorrect statement about RNA molecule
  1. A It shows high rate of mutation than DNA
  2. B It is genetic material in some viruses
  3. C Some reactions are catalyzed by RNA
  4. D RNA follows chargaff rule
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Correct answer: D

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