Enzymes

Question 1

Enymes

Answer 1

Biological catalysts that speed up the rate of a chemical reaction without being changed or used up in the reaction; made out of protein

Question 2

How does temperature affect enzymes?

Answer 2

At a higher temperatures the molecules have more kinetic energy, therefore the likelihood of successful collisions is higher. After the optimum temperature, at about 40 degrees C, the enzymes may become denatured.

Question 3

What is the lock and key hypothesis?

Answer 3

Enzymes are specific to one particular substrate(s) as the active site of the enzyme, where the substrate attaches, is a complementary shape to the substrate. This is because the enzyme is a protein and has a specific 3-D shape

Question 4

What is the optimum pH?

Answer 4

Normally around 7. In the stomach at about 2.

Question 5

Photosynthesis

Answer 5

the process by which plants manufacture carbohydrates from raw materials using energy from light

Question 6

How is carbon dioxide obtained?

Answer 6

Diffuses in through the stomata

Question 7

How is water obtained?

Answer 7

Taken up by the roots and transported through the xylem to the leaves

Question 8

Chlorophyll

Answer 8

A green pigment that transfers energy from light into energy in chemicals, for the synthesis of carbohydrates

Question 9

For what is glucose made in plants used for?

Answer 9

Converted to sucrose for transport in the phloem; as nectar to attract insects for pollination; the carbohydrates made into lipids for an energy source in seeds; combined with nitrate ions to makes amino acids and proteins

Question 10

Why do plants need magnesium?

Answer 10

To make chlorophyll.

Question 11

Why do plants need nitrogen?

Answer 11

To make amino acids and build proteins.

Question 12

What are the effects of a magnesium deficiency?

Answer 12

Yellowing between the veins of leaves (chlorosis)

Question 13

What are the effects of a nitrogen deficiency?

Answer 13

Stunted growth and yellowing of leaves