Two corn plants are studied. One is resistant (R) and the other is susceptible (S) to a certain pathogenic fungus. The following crosses are made, with the results shown

R male X S female = all S progeny

R female X S male = all R progeny

Which of the following are correct about inheritance?

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#Question id: 12948

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

Proteolytic cleavage of DNA polymerase by subtilisin caused loss of its nick translation activity. Which of the following properties is lost?

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#Question id: 12989

#Section 2: General Biology

Choose the correct statement related to hydrogen bond and Van der Waals interactions

a. Hydrogen bond formation takes place between dipole-dipole interaction.

b. Van der waals interaction takes place between induced dipole-induced dipole.

c. Hydrogen bond formation takes place between induced dipole-induced dipole.

d. Van der waals interaction takes place between dipole-dipole interaction.

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#Question id: 12991

#Section 2: General Biology

Choose the correct statements

a. Secondary structures are stabilized by hydrogen bonds.

b. Hydrogen bond always formed between non bonded atoms.

c. the folded length of an amino acid in α-helix reduced almost 3 times than linear structure.

d. Only dihedral angle changes during the formation of secondary structure while bond length remains unchanged

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#Question id: 12992

#Section 2: General Biology

α-helix changes its configurations according to the environment then

a. membrane encompassing α-helix have nonpolar residue oriented toward the membrane lipid.

b. if α-helix is found in plasm then polar residue will be oriented toward the outside.

c. if α-helix is found in plasm then nonpolar residue will be present inside the core.

d.  membrane encompassing α-helix have polar residue oriented towards the membrane lipid.

Choose incorrect statement

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#Question id: 12993

#Section 2: General Biology

Out of these which of the following is true regarding the propensity of α-helix.

a. any amino acid which can take up desirable ϕ and ψ angle close to -57 and -47 will favour the formation of a α-helix

b. amino acid such a proline and glycine have lowest propensity will favour formation of α-helix.

c. if the resultant change in the value ΔΔG0 is positive then it will favour the formation of α-helix.

d. if the resultant change in the value ΔΔG0 is zero or close to zero then it will favour the formation of α-helix.

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#Question id: 12995

#Section 2: General Biology

Which of the following constraints affect the stability α-helix, 

a) the intrinsic propensity of an amino acid residue to form an α-helix.

b) the interactions between R groups.

c) the bulkiness of adjacent R groups.

d) the occurrence of Pro and Gly residues.