Respiration B4

Question 0

why is respiration important?

Answer 0

• movement
• synthesis of large molecule
• active transport

Question 1

word equation for aerobic respiration

Answer 1

glucose + oxygen gas ➡️ carbon dioxide + water + energy

C6H12O6 + 6O2 ➡️ 6CO2 + 6H2O + ATPs

Question 2

process of respiration

Answer 2

during aerobic respiration, glucose from food reacts with oxygen. the reactions release energy from glucose

Question 3

which cells carry out the most aerobic respiration and why?

Answer 3

all cells can carry out respiration, muscle cells are more active carrying out repatriation more than other cells especially when exercising

Question 4

word equation for anaerobic respiration for animals

Answer 4

glucose ➡️ lactic acid + (energy)

Question 5

word equation for plants and micro organisms

Answer 5

glucose ➡️ ethanol and carbon dioxide + energy

Question 6

what situations does the body carry out anaerobic respiration?

Answer 6

sprinting - when not enough oxygen is transferred to the cells therefore anaerobic respiration is carried out

Question 7

what is the effect of lactic acid on animal cells?

Answer 7

lactic acid causes cramp in the muscles. it is toxic in large amounts

Question 8

what are the similarities and differences between anaerobic and aerobic respiration?

Answer 8

anaerobic - without oxygen
aerobic - with oxygen

anaerobic - quicker
aerobic - slower

anaerobic - yes lactic acid production
aerobic - no lactic acid production

anaerobic - no (in the cytoplasm)
aerobic - yes

Question 9

what is the nucleus?

Answer 9

contains DNA which carries out the genetic code for making enzymes used in the chemical reactions of respiration

Question 10

what is the cytoplasm?

Answer 10

where the enzymes are made and which contains the enzymes

Question 11

what is the mitochondria?

Answer 11

contain enzymes for the reactions in aerobic respiration (in animals, plants and yeast)

Question 12

what does the cell membrane do?

Answer 12

allows gases and water to pass in and out of the cells while making a barrier to other chemicals

Question 13

3 useful products made using anaerobic respiration:

Answer 13

1. biogas
2. bread
3. alcohol

Question 14

how do you sample using quadrat?

Answer 14

1. place the square grid (quadrat) on the ground
2. identify the animals and plants (using a key) and count how many there are
3. plant growth is recorded as percentage cover (%)

Question 15

why must the quadrat be placed randomly?

Answer 15

allows reliable comparisons between different locations. it also removes bias

Question 16

what is a transect?

Answer 16

a transect is when you take samples at regular intervals e.g every 1m along a straight line

Question 17

what are transecting used for?

Answer 17

useful when looking at how many types of plants change gradually from one area to another