Question

1. Briefly describe the structure of RNA. What makes it different than DNA?
2. What do DNA and RNA stand for? What are their roles?
3. What are the DNA base pairing rules?
4. What are the RNA base pairing rules?
5. Describe what the following abbreviations stand for (ACGTU).
6. What is the “norm” for lactose digestion in adults?
7. Why are some people lactose intolerant?
8. Is lactose tolerance relatively recent or ancient?

Answer 1

Answer

1) RNA is composed of multiple nucleotides. Their are four types of nucleotides that form RNA

- Adenosine Triphosphate

- Guanosine Triphosphate

- Cytidine Triphosphate

- Uracil Traphosphate

It it the Uracil triphosphate which is present in RNA and absent in DNA, makes the RNA different from DNA. Also the RNA is not always showing base pairing.

2) DNA stands for Deoxyribose nucleic acid and RNA stands for Ribose nucleic acid.

DNA in most of the organism acts as Hereditary material for transmission and expression of characters to next generation.

RNA act as genetic material that are required in protein synthesis.

3) DNA base pairing follows chargaffs rule which states that number of adenine + guanine = Cytosine + thymine

4) RNA base pairing do not follow the chargaffs rule. But they form base paring , adenosine with uracil and guanosine with cytidine triaphosphate.