energy and ATP Flashcards

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1
Q

what is energy

A

the ability to do work

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2
Q

what types of work does an organism do

A

chemical work, transport and mechanical work

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3
Q

give examples of chemical work

A

biosynthesis which is making carbohydrates, proteins, lipids and the input of energy is needed for monomers to make biological molecules

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4
Q

gives examples when energy is needed for transport

A

active transport and the sodium potassium pump because you are moving particles against a concentration gradient across a cell membrane which requires energy

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5
Q

give examples of when energy is needed for mechanical work

A

contraction of proteins (muscle contraction and movement of chromosomes and beating of cillia)

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6
Q

where is all energy derived from

A

the sun

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7
Q

what is ATP

A

one of the main sources of energy for metabollic reactions in all living things

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8
Q

how does ATP work

A

takes energy stored within glucose and distributes it into smaller currencies these smaller currencies release less heat and dont denature enzymes

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9
Q

what is atp made of

A

adenine
ribose
three phosphate groups

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10
Q

how do you write atp in words

A

adenosine triphosphate

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11
Q

where is the majority of energy storage

A

triglycerides and not ATP

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12
Q

when is ATP broken down

A

when energy is needed to power a function in the cell

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13
Q

how many atp molecules does aerobic respiration produce

A

38

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14
Q

how many atp molecules does anaerobic respiration produce

A

2

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15
Q

whats the equation of the synthesis of ATP

A

ATP+water (reverse arrows) ADP+Pi

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16
Q

what ways can ATP be synthesised

A

phosphorylation, oxidative phosphorylation and substrate level phosphorylation

17
Q

what is phosphorylation

A

light energy used to add a phosphate ion to ADP to make ATP

18
Q

what is oxidative phosphorylation

A

oxygen from mitochondria promotes phosphorylation

19
Q

what is substrate level phosphorylation

A

transferring a phosphate from one molecule to another

20
Q

what happens when `ATP is hydrolysed

A

releases energy

21
Q

why is ATP a suitable energy source

A

releases a relatively low amount of energy
only needs to break one bond and energy is released instantaneously
makes other compounds more reactive (by phosphorylation/lowering activation energy)
can be rapidly resynthesised because only one bond to form
highly soluble in water

22
Q

why is it an advantage that ATP is highly soluble in water

A

easily transported in cells eg mitochondria ro ribosomes for protein synthesis and doesnt leave cells meaning it cant freely diffuse across lipid bilayers because it requires hydrophillic carrier proteins