END OF YEAR ASSESSMENT

Question 1

Enzyme

Answer 1

a protein that functions as a biological catalyst

Question 2

Lock and Key method & active site

Answer 2

active site is specific for the substrate. Enzymes are very specific and can only catalyse for one type of reaction

Question 3

Denaturing

Answer 3

an enzyme will denature if it is exposed to extremes of pH, temperature and concentration of solution. Once denatured, it cant fit with any substrates.

Question 4

Amylase

Answer 4

breaks down starch

Question 5

Lipase

Answer 5

break down of fatty acids

Question 6

Protease

Answer 6

break down of protein

Question 7

test for protein

Answer 7

Biuret solution

Question 8

test for reducing sugars

Answer 8

Benedict’s solution

Question 9

Diffusion

Answer 9

the movement of particles from an area of high concentration to an area of low concentration down the concentration gradient through a semi permeable membrane.

Question 10

Osmosis

Answer 10

the movement of water from an area of high concentration to low concentration down the concentration gradient through a partially permeable membrane.

Question 11

Active Transport

Answer 11

movement of particles from low to high concentration against the concentration gradient. this process requires energy.

Question 12

Eukaryotic cell

Answer 12

• animals and plants

- has a nucleus

Question 13

Prokaryotic cell

Answer 13

• bacteria only

Question 14

Sperm Cell

Answer 14

• haploid nucleus
• acrosome
• mitochondria packed middle piece
• tail for swimming

Question 15

Egg Cell

Answer 15

• contains nutrients for embryo

- contains genetic material for female

Question 16

Light Microscope

Answer 16

• low resolution

- low magnification

Question 17

Electron Microscope

Answer 17

• high resolution

- high magnification

Question 18

Equation for magnification

Answer 18

magnification = image size / actual size