Spaced Rep - 4I

Question 1

Substrate

Answer 1

In relation to amylase, starch is this

Question 2

Maltase

Answer 2

An enzyme that speeds up the breakdown of maltose to glucose

Question 3

Denatured

Answer 3

When the enzymes active site changes shape

Question 4

Complementary

Answer 4

an enzyme’s active site and substrate are said to be this

Question 5

Active site

Answer 5

What is formed when the enzyme and the substrate bind together

Question 6

What is the role of bile in the digestive system?

Answer 6

• neutralises the stomach acids
• emulsifies lipids to break down large lipid globules into smaller ones
• allows lipase to perform easier as it increases the surface area, increasing the breakdown of lipids

Question 7

How is the ileum adapted for its function?

Answer 7

• has folded walls, villi and microvilli, to increase the surface area for maximum absorption of digested products
• ileum is one cell thick, providing a short diffusion distance
• capillaries are very close to the walls of the ileum, providing a short diffusion distance also maintaining the concentration gradient
• has a lacteal which helps produce product of lipid digestion to be absorbed

Question 8

How can you investigate the population size of daffodils on Broadfield?

Answer 8

• divide sampling area using measuring tapes to create a x and y axis
• use a random number generator to generate coordinates
• at each coordinate place a quadrat down and count the number of daffodils in the quadrat
• repeat a large number of times, 20+
• divide the total area of Broadfield by the area of a quadrat and times by the average number of daffodils to estimate the population size

Question 9

Radicle

Answer 9

the root of a seed

Question 10

shoot

Answer 10

plumule

Question 11

cotyledons

Answer 11

seed leaves which contain food stores

Question 12

In order to germinate, the seeds need a food store. Why? And what might be in the food store?

Answer 12

• needs a food store to respire to grow as has no leaves yet to photosynthesize
• the food store must contain carbohydrates such as starch and proteins

Question 13

What is the membrane that surrounds the developing embryo called?

Answer 13

amnion

Question 14

What helps protect the embryo from sudden movements and bumps?

Answer 14

amniotic fluid

Question 15

What widens at the end of the pregnancy?

Answer 15

cervix

Question 16

How does excretion differ from egestion?

Answer 16

excretion is the removal of metabolic waste in the body, for example sweat, egestion is the removal of undigested food in the form of faeces