Molecular Biology 2

Question 1

where is DNA found

Answer 1

mainly in cell nucleus

Question 2

what does the DNA backbone consist of?

Answer 2

deoxyriboses linked by phosphodiester bridges

Question 3

describe the structure of DNA

Answer 3

double-stranded structure held together by hydrogen bonding between base pairs. two chains wound around each other to form a regular double helix

Question 4

where is RNA found

Answer 4

mainly in the cytoplasm

Question 5

what is the differences between RNA and DNA

Answer 5

1 - uracil replaces thymine. 2 - ribose replaces deoxyribose. 3 - single-stranded (no base pairing)

Question 6

what is the genome

Answer 6

whole genetic information within a single cell nucleus

Question 7

name the steps of protein synthesis

Answer 7

1 - in nucleus, DNA unfolds to expose base pairs of template strand. 2 - transcription: RNA polymerase copies sequence of bases in template strand of DNA to produce mRNA. 3 - mRNA translated by tRNA, using ribosome as a functional support (in cytoplasm)