The Process of Life. B4

Question 1

what 2 things do all cells contain?

Answer 1

DNA and organelles

Question 2

what form are DNA molecules in?

Answer 2

double helix

Question 3

what does the cytoplasm do?

Answer 3

chemical reactions take place. production of enzymes and other proteins

Question 4

what is the cell membrane?

Answer 4

allow chemicals like gases to pass through but prevents other chemicals from entering the cell

Question 5

what do all plant cells contain?

Answer 5

cell wall, vacuole, chloroplasts

Question 6

what do the chloroplasts contain?

Answer 6

chlorophyll

Question 7

what do enzymes do?

Answer 7

they are protein molecules that speed up the rate of chemical reactions

Question 8

what happens during the ‘lock and key’ model?

Answer 8

a reaction takes place, products are released and the process can start again

Question 9

what is active site?

Answer 9

it is where the molecule fits into the enzyme

Question 10

what can, irreversibly, change the shape of the active site?

Answer 10

temperature and altering the pH level

Question 11

what are the two types of respiration?

Answer 11

aerobic and anaerobic

Question 12

what is the function of the mitochondria in a cell?

Answer 12

contains the enzymes needed for aerobic respiration

Question 13

what is the word equation for photosynthesis?

Answer 13

carbon dioxide+ water= light energy/ chlorophyll+ glucose+ oxygen

Question 14

what is the definition of diffusion?

Answer 14

movement of a substance from high concentration to low concentration

Question 15

what is osmosis?

Answer 15

movement of water from a dilute solution to a concentrated solution.