Jan 2020 2Br Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Differences between the structure of DNA and structure of RNA

A
  • DNA is double helix/stranded
  • DNA contains deoxyribose
  • DNA longer/larger
  • DNA contains Thymine not Uracil
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

DNA sequence of bases

A

AT - CG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Sequence order of bases on DNA strand

CATCATCCT

A

GUAGUAGGA

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

RNA sequence of base

A

AU - CG

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

How many bases in 1000 chain of amino acids

A

1000 times 3 which is 3000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

similarities in use of biofuel compared with fossil fuels

A

Both are burnt
Both produce CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Differences in use of biofuel compared with fossil fuels

A

Biofuel is renewable
Fossil fuels produce more energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

which organ produces insulin

A

pancreas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Role of insulin

A
  • lower blood glucose
    to glycogen
  • store in liver / muscles
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

How bacteria are genetically modified to produce human insulin

A
  • insulin gene cut with restriction enzymes
  • same resctiction enzymes are used to cut plasmid
  • plasmid and insulin gene combined to form recombinant plasmid by ligase
  • bacteria put in FERMENTER
    and reproduce
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why FERMENTER is cleaned using steam before

A
  • remove unwanted bacteria
  • prevent contamination
  • prevent competition
  • remove pathogen
  • sterelise
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

why many eggs are needed for cloning to be succesful

A
  • not all egg survive
  • not all embryos survive
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What scientist should do with the zygote so it develops to fetus

White rhino sperm in northern white rhino that is old

(CLONING)

A
  • mitosis
  • Place embryo in uterus
  • use southern white rhino as surrogate mother
  • bcs Northern white rhino is too old
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How students set up transpiration apparatus to measure water loss

A
  • cut plant under the water
  • seal connection so no air gap
  • introduces air bubble
  • measure distance
  • convert answer into volume by πr2h
    distance times πr2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Why plants grow better in windy conditions

A
  • more transpiration in wind
  • cools plant
  • more minerals ions transported
  • for eg nitrate for amino acids
  • cell is not urgid
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Discuss what effect a change in the sequence of bases could have on the functioning of the enzyme produced

A
  • Will change amino acids sequence
  • change shape of active site
  • Enzyme does not bind
  • protein does not function
15
Q

One way incidence of mutation could be increased

A
  • radtiation
  • alcohol/smoking/tobacco
16
Q

How very warm weather results in a change in the conc and vol of the urine

A
  • increase sweat
  • blood conc increase (bcs of hypertonic solution)
  • more ADH released from pituitary gland
  • more water reabsorbed from collecting duct
  • more concentrated urine produced