biology AS first test

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  • Created by: charlie
  • Created on: 08-09-13 22:05
how many amino acids in each protein?
20
1 of 20
what do the amino acids contain?
carbon, hydorgen, oxygen, nitrogen, (some sulfur)
2 of 20
primary structure
the order in which amino acids are arranged in a protein
3 of 20
secondary structure
chains coil up/fold to pleats held by weak forces of attraction (H2 bonds)
4 of 20
tertiary structure
coiled amino acid chains folded into ball held together by both weak (H2 bonds) and strong bonds (sulfur bridges)
5 of 20
what is a protein called if it has a roughly spherical shape and what is an example of this?
globular protein and an enzyme
6 of 20
what are genes?
sets of coded instructions for building proteins
7 of 20
how many proteins does one gene code for?
one
8 of 20
DNA stands for?
Deoxyribonucleic acid
9 of 20
what are the 4 chemical bases?
A, T, C, G
10 of 20
what does the sequence of bases determine?
order in which amino acids are put together in particular protein
11 of 20
why do we need to breathe?
allows air with higher O2 concentration taken into lungs and CO2 removed
12 of 20
what are the lungs suspended in?
airtight throax
13 of 20
breathing in process
intercostal musc. + diaphragm contract ---> throax vol inc. ---> dec pressure
14 of 20
breathing out process
intercostal musc. + diaphragm relax ---> throax vol dec. ---> inc. pressure
15 of 20
is energy required to make valves in heart work?
no, its the blood pressing on the valves
16 of 20
cardiac cycle process
atria ---> contract to ventricles ---> contract to aorta + pulmonary artery ---> blood flows down arteries to atria + fills
17 of 20
what happens to the valves once blood has left the heart?
shut to maintain high pressure in arteries + prevent backflow
18 of 20
what specialised cells produce electrical impulse?
sino-atrial node
19 of 20
what supplies blood to the heart?
coronary arteries come off aorta
20 of 20

Other cards in this set

Card 2

Front

carbon, hydorgen, oxygen, nitrogen, (some sulfur)

Back

what do the amino acids contain?

Card 3

Front

the order in which amino acids are arranged in a protein

Back

Preview of the back of card 3

Card 4

Front

chains coil up/fold to pleats held by weak forces of attraction (H2 bonds)

Back

Preview of the back of card 4

Card 5

Front

coiled amino acid chains folded into ball held together by both weak (H2 bonds) and strong bonds (sulfur bridges)

Back

Preview of the back of card 5
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