lecture 2 - gene expression

Question 1

what is a gene

Answer 1

unit of genetic information

Question 2

what is a gene chemically composed of

Answer 2

sugar and phosphate in. a linear molecule DNA

Question 3

howmmany genes in human

Answer 3

20,500

Question 4

what forms ATP

Answer 4

ATP synthase

Question 5

what pathway leads to formation of ATP

Answer 5

adenosine monophosphate- activated protein kinase (AMPK)

Question 6

what is the major function of proteins

Answer 6

catalytic activity

Question 7

what are other functions of proteins

Answer 7

transport

motor function

signalling

regulators

Question 8

how many hydrogen bonds between T and A

Answer 8

2

Question 9

how many hydrogen bonds between C and G

Answer 9

3

Question 10

what is DNA replication

Answer 10

adenosine monophosphate- activated protein kinase (AMPK)

Question 11

what is the function of DNA topoisomerases

Answer 11

relieves helical winding and DNA tangling

Question 12

what does DNA helices do

Answer 12

help
in opening up the DNA helix so that it can be copied

Question 13

what does DNA polymerase do

Answer 13

catalyze nucleoside triphosphate polymerization

Question 14

what does DNA ligase do

Answer 14

degrades RNA primers to seal together the discontinuously synthesized lagging-strand DNA fragments

Question 15

what is transcription carried out by

Answer 15

RNA polyermase