Question

The DNA is mostly _____ because the hyperchromic effect is very _____. The fact that there is any hyperchromicity at all means that there may be a _____ amount of intramolecular base-pairing.a. greatb. largec. double-strandedd. smalle. single-stranded

Answer 1

Answer:1.c 2.d 3. d

Explanation:

The DNA hyperchromic effect can be defined as the absorbance of radiation or light by the nitrogen bases of DNA. This phenomena is effective when the DNA is in single stranded condition. For observing the hyperchormic effect the DNA is required to be denatured at high temperature or by increasing the level of pH.

The two strands of the DNA when get separated the absorbance of the DNA solution also increases. This results due to reduction in the base-base interaction and hence, increases the absorbance of light like UV by the bases.

Answer 2

Answer: Option C,D and D.

1. C 2.D.3.D

Explanation:

DNA, deoxyribonucleid acid is the genetic material or component of living organisms . It has two two chains that coil around each other to form double helix structure. It is found in the nucleus because it is small and the cell itself is small.DNA have two base pairs and carries genetic information for growth, reproduction, functioning and development.

The DNA is double stranded, the hyperchromic(,its ability to absorb light)effect is small, and there are small amount of molecular base pairing. The hyperchromic effect of DNA is the ability of DNA to absorb light at night temperature. The double stranded DNA is heated at high temperature,and it unwind to single stranded DNA which have the ability to absorb light.