ML Metabolism L 1, 5 & 6 I think Flashcards Preview

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Flashcards in ML Metabolism L 1, 5 & 6 I think Deck (37)
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1

a high intracellular concentration of ATP will have what effect on the rate of glycolysis and gluconeogenesis?

decrease in rate of glycolysis & increase in rate of gluconeogenesis

2

can the body make fatty acids?

yes

3

does glycogen have high or low osmotic potential? and why?

low
so doesn’t bring in lots of water as it would if it was glucose and cause the cell to explode

4

GLUCONEOGENESIS

new glucose synthesised by the body
(making new glucose)

5

Gluconeogenic substrates meaning?

what we can use to make glucose

6

Gluconeogenic substrates

>Lactate from anaerobic glycolysis
>Amino acids
>Glycerol from TAG's

7

glycogen is a storage molecule containing which of the following types of glycosidic bonds?

Alpha 1,4 and Alpha 1,6

8

how does NAD become NADH

redox reaction, accepting a hydrogen and electron

9

how is energy released from ATP?

energy is released when the bonds between the 3 phosphates are hydrolysed (broken)

10

how is glycogen used in the liver?

using glycogen to maintain blood glucose levels

11

how is glycogen used in the muscles?

to power muscle contractions

12

how many carbons are usually the end point of fatty acid synthesis?

16 carbons is the usual end point of synthase

13

how many electron transport complexes are present in the mitochondiral electron transport chain?

4

14

how many electron transport complexes transfer protons (H+) to the inner mitochondrial space?

3

15

is citric acid cycle, catabolic, anabolic or both?

can be both

16

key points of stage 2 - catabolism (give 3 answers)

1) Intracellular cytoplasmic and mitochondrial
2) Some energy back by substrate phosphorylation
3) Many pathways
4) Bbm --> even simpler molecules
5) Oxidative process
6) Requires NAD+, NADP+ FAD

17

key points stage 3 catabolism (2 answers)

1) Mitochondria
2) One pathway Krebbs cycle

18

role of NADP (dont get mixed up with NAD)

Used in anabolic process as a form od reducing power to make other molecules

19

some key points of stage 1- catabolism? give 3 answers

1) happens outside the cell
2) no ATP produced
3) Breaking complex molecules into smaller ones so we can get them into our cells

20

what are the two classes of metabolic pathways?

catabolic
anabolic

21

what does ATP stand for?

adenosine triphosphate

22

what does OILRIG stand for?

oxidation is loss, reduction is gain

23

what is ATP made of?

Adenine base, ribose sugar and triphosphate

24

what is glycogen used for?

vital for glucose requiring tissues

25

what is lipid (triacylglycerol) used for

largest energy store

26

what is metabolism?

Metabolism is a series of chemical reactions linked where one molecule is converted
to another molecule

27

what is muscle protein needed for?

important in prolonged starvation

28

what is the anabolic pathway

formation of complex molecules from simpler ones by utilising energy

29

what is the catabolic pathway?

breaking complex molecules down into simpler ones

30

what is the role of NAD (2 roles)

1) electron carrier
2) used to make ATP in oxidative phosphorylation