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Chart & Stethoscope

BIOLOGY NEET - 2020
SOLUTIONS

Q1. Which of the following is not an attribute of a population?

1. Sex ratio

2. Natality

3. Mortality

4. Species interaction

4. Species interaction

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Q2. The process of growth is maximum during

1. Log phase

2. Lag phase

3. Senescence

4. Dormancy

1. Log phase

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Q3. The roots that originate from the base of the stem are

1. Fibrous roots

2. Primary roots

3. Prop roots

4. Lateral roots

1. Fibrous roots

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Q4. Match the following diseases with the causative organism and select the correct option.
Column-I
a. Typhoid
b. Pneumonia
c. Filariasis
d. Malaria

Column-II
i. Wuchereria
ii. Plasmodium
iii. Salmonella
iv. Haemophila

1. a (i) b (iii) c (ii) d (iv)

2. a (iii) b (iv) c (i) d (ii)

3. a (ii) b (i) c (iii) d (iv)

4. a (iv) b (i) c (ii) d (iii)

2. a (iii) b (iv) c (i) d (ii)

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Q5. In which of the following techniques, the embryos are transferred to assist those females who cannot conceive?

1. ZIFT and IUT

2. GIFT and ZIFT

3. ICSI and ZIFT

4. GIFT and ICSI

1. ZIFT and IUT

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Q6. Identify the wrong statement with reference to the gene ā€˜Iā€™ that controls ABO blood groups.

1. The gene (I) has three alleles

2. A person will have only two of the three alleles

3. When IA and IB are present together, they express same type of sugar.

4. Allele ā€˜iā€™ does not produce any sugar.

3. When IA and IB are present together, they express same type of sugar.

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Q7. Choose the correct pair from the following

1. Ligases - Join the two DNA molecules

2. Polymerases - Break the DNA into fragments

3. Nucleases - Separate the two strands of DNA