(3.1.5.1) RNA

Question 1

what is RNA called?

Answer 1

ribonucleic acid.

Question 2

what is RNA?

Answer 2

a polymer of nucleotides chemically joined together by condensation reactions forming phosphodiester bonds.

Question 3

what is the function of RNA?

Answer 3

to transfer genetic information from DNA to the ribosomes.

Question 4

what is the structure of a single RNA nucleotide?

Answer 4

includes a phosphate group linked to a ribose sugar, which is then linked to a nitrogen-containing base

• the possible bases can be uracil, adenine, guanine and cytosine.

Question 5

give ways in which the nucleotides in DNA are different from the nucleotides in RNA.

Answer 5

1. DNA contains deoxyribose sugar and RNA contains ribose sugar
2. DNA has thymine as an organic base whereas RNA has uracil
3. RNA is smaller than DNA

Question 6

what is the role of mRNA?

Answer 6

to carry the genetic code out the nucleus to the ribosome for the formation of a polypeptide

Question 7

what is the role of tRNA?

Answer 7

to carry specific amino acids to the mRNA at ribosomes for the formation of a polypeptide

Question 8

what is the role of rRNA?

Answer 8

to form ribosomes with protein molecules