Consider the following statements regarding satellite DNA and choose the correct answer:<br>1. Satellite or Repetitive DNA consists of short identical genes which are repeated in tandem several hundred or thousand times<br>2. Such DNA is found in the region of the chromosome adjacent to the centromere<br>3. It is easy to separate repetitive DNA by ultracentrifugation

Consider the following statements and choose the correct answer:
1. In the phenomenon of linkage and crossing over, the genes are arranged in a linear order in a chromosome
2. The linkage groups in an organism are equivalent to the number of chromosome pairs
3. The chances of crossing over are more between two closely placed genes as compared to the genes placed in far proximity
4. The position of genes is very definite in the chromatid

A

1, 3 and 4 are true

B

1 and 4 are true

C

1, 2 and 4 are true

D

2 and 3 are true

Consider the following statements regarding the theory of linkage and choose the correct answer:
1. Genes are arranged in a linear fashion in the chromosomes
2. Genes that show linkage are situated in the chromosome
3. Linked genes remain in their original combination during the course of inheritance
4. The genes which are widely separated show strong linkage, while those closely located, have more chances to get separated by crossing over

A

Only 1, 2 and 3 are true

B

Only 2, 3 and 4 are true

C

Only 1, 3 and 4 are true

D

Only 3 and 4 are true

Consider the following statements regarding centromere and choose the correct answer:
1. The position of the centromere is constant for a particular chromosome
2. The structure and function of the centromere are different from that of the rest of the chromosome
3. During division the centromere is functional, while the rest of the chromosome is genetically inactive
4. The position of the centromere varies in different chromosomes

A

Only 1 is true

B

Only 1 and 2 are true

C

Only 1, 2 and 3 are true

D

1, 2, 3 and 4 are true

In a six-digit number, the digit of thousands place is 4. The digit at ten's place is double that of digit at thousand's place and digit at hundreds places is half of the digit at thousand’s place. The digit at unit's place is half of the digit at hundred's place. Digit at Ten thousand's place is sum of the digits at thousands and hundreds place and digit at lakh's place is half the digit at ten thousands place. What will be the number?

A

634821

B

364812

C

634281

D

364281

On 17th December 2020, India recently launched the CMS-01 communication satellite into the geostationary Transfer Orbit. What statements is/are CORRECT regarding the satellite? 1. The satellite was launched on a PSLV-C50 launch vehicle. 2. The satellite will provide telecom services in the extended C-Band of the frequency spectrum. 3. Is India's 40th communication satellite that will replace the functions of GSAT-12 launched in 2013. Select the correct answer using the code given below. (a) 1 only (b) 2 only (c) 3 only (d) Both 1 and 2

A

b

B

c

C

a

D

d

This are the following statements given regarding satellite’s motion a. A satellite in geostationary orbit lies in the same plane with equator b. A satellite in geosynchronous orbit lies in the same plane with equator c. A satellite in geostationary orbit does not lie in the same plane with equator, it is inclined at some angle from plane of equator d. A satellite in geosynchronous orbit does not lie in the same plane with equator, it is inclined at some angle from plane of equator Choose one of the following options

A

Both option a and b are correct

B

Both option a and c are correct

C

Both option a and d are correct

D

Both option b and c are correct

Consider the following statements: i. One metre is one-hundredth of one kilometre. ii. One lakh is equal to one hundred thousand. iii. One millilitre is one-hundredth of one litre. iv. One crore is equal to one hundred lakh. Which of the above statements are correct?

A

(i) and (iv)

B

(ii) and (iv)

C

(ii) and (iii)

D

(iii) and (iv)

Consider the following statements with regard to the functions of the centromere in the chromosome.
1. Centromeres are the centres of movement of the chromatids or chromosomes during anaphase separation.
2. Acentric chromosomes lack the capacity to segregate in a regular fashion.
3. Crosing-over in one arm of a metacentric chromosome does not affect the crossing over in the arm of the same chromosome.
Which of the statements given above are correct?

A

1, 2 and 3

B

1 and 2

C

2 and 3

D

1 and 3

Consider the following statements regarding DNA replication and choose the correct answer:
1. The very first requirement of DNA synthesis is the presence of a template or plan along which the new strand is to be constructed
2. The second requirement is of a DNA-dependent-DNA polymerase or simply DNA polymerase enzyme
3. A DNA Pol cannot join two free nucleotides; one of them must be anchored by hydrogen bonds to a DNA strand
4. Replication takes place bidirectionally

A

1, 2, 3 and 4 are true

B

Only 2 and 4 are true

C

Oniy 2, 3 and 4 are true

D

Only 1 and 2 are true

Which of the following is/are true? i. All children will inherit an X chromosome from their mothers. ii. All children will inherit a Y chromosome from their mothers. iii. A child who inherits an X chromosome from the father will be a boy. iv. A child who inherits an X chromosome from the father will be a girl.

A

i and iv only

B

i and iii only

C

i only

D

i, ii, iii and iv

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