131.

Optical density of a 400 base pair long 1 ml DNA solution was found to be 0.052. How many DNA molecules are present in the solution?

[1 base pair = 650 dalton, optical density of 1.0 D corresponds to 50 µg DNA/ ml]

• 6.023 x 10¹²    

• 6.023 x 10¹⁸

• 4.633 x 10¹⁸

• 5.2 x 10¹³

The idea that an altruistic gene will be favoured if r > C/B, where r is the coefficient of relaedness, B is the benefit to the recipient of the altruism, and C is the cost incurred to the donor, is known as

• Red queen hypothesis

• Handicap principle

• Hamilton’s rule  

• Competitive exclusion principle

The following table shows survival and fertility data for a seasonally breeding species

SEASON	PROPORTION SURVIVING	FERTILITY
0	1.0	0
1	0.5	20
2	0.0	-

Based on above data, net productive rate (R₀) of the species will be

• 1

• 5

• 10

• 20

In a transformation experiment, donor DNA from an E.coli strain with the genotype Z^-Y⁺ was used to transform a strain of genotype Z^-Y⁺. The frequencies of transformed classes were:

Z^-Y⁺   200

Z^-Y    400

Z^-Y⁺   400

Total 1000

What is the frequency (%) with which Y locus is co-transformed with the Z locus?

• 1

• 20

• 33.3

• 40

A cross was between pure wild type males and brown eyed, curled winged females of D. melanogaster. The F₁ females were test crossed. The F₂ progeny obtained was as follows:

Wild type    200

Brown eyes, curled wings   150

Brown eyes, normal wings   30

Normal eyes, curled wings    20

Total 400

The genetic distance (cM) between brown eye and curled wing loci is:

• 12.5

• 50

• 150

• 25

The chlorosis (yellowing) symptom of iron deficiency is influenced by

• Sodium and Potassium

• Sodium and Phosphorus

• Calcium and Nitrogen

• Potassium and Phosphorus   

With reference to lac operon, what will be the phenotype of an E.coli strain having a genotype i^-o⁺y^-/F’i⁺o^cz^-y⁺?

• Constitutive for both β-galactosidase and lac permease.

• Inducible for both β-galactosidase and lac permease.

• Inducible for β-galactosidase and constitutive for lac permease.

• Constitutive for β-galactosidase and inducible for lac permease.

KCL (100 mM) was entrapped inside large unilamellar vesicles. A diffusion potential across the bilayer can be generated by diluting with buffer containing.

• 100mM KCL a protonophore

• 100mL NaCl and protonophore

• 100mM KCl and a K⁺ specific ionophore.

• 100mM NaCl and a K⁺ specific ionophore.   

The map given below shows a meandering river following a semi-circular path, along which two villages are located at A and B. The distance between A and B along the east-west direction in the map is 7 cm. What is the length of the river between A and B in the ground?

• 1.1 km

• 3.5 km

• 5.5 km

• 11.0 km

Consider the following equation:

x² + 4y² + 9z² = 14x + 28y + 42z + 147

where x, y and z are real numbers. Then the value of x + 2y + 3z is

• 7

• 14

• 21

• Not unique