B5 Plant nutrition

Question 1

Define photosynthesis

Answer 1

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

Question 2

State the word equation for photosynthesis

Answer 2

6CO^2+6H^2O+→→→C^6+H12+O^6+6O^2

Question 3

chlorophyll transfers what?

Answer 3

transfers light energy into chemical energy in molecules, for the synthesis of carbohydrates

Question 4

Outline the subsequent use and storage of the carbohydrates made in photosynthesis

Answer 4

plants take the glucose formed during photosynthesis and combine the carbohydrate with oxygen which is called respiration

Question 5

Describe the significance of the features of a leaf in terms of functions, to include:
Palisade mesophyll and distribution of chloroplasts

Answer 5

photosynthesis

Question 6

Describe the significance of the features of a leaf in terms of functions, to include: stomata, spongy mesophyll cells and guard cells

Answer 6

gas exchange

Question 7

Describe the significance of the features of a leaf in terms of functions, to include: xylem

Answer 7

transport and support

Question 8

Describe the significance of the features of a leaf in terms of functions, to include: phloem

Answer 8

transport

Question 9

Describe the importance of nitrate ions for making amino acids

Answer 9

Plants use nitrates as a supply of nitrogen

Question 10

Investigate and describe the effect of varying light intensity and temperature on the rate of photosynthesis

Answer 10

You can easily investigate the effect of light intensity on the rate of photosynthesis by using an aquatic (lives in water) plant like pondweed.
To do this, change the distance between the lamp and the pondweed and count the number of bubbles produced per unit time (e.g. five per minute).
In this experiment, light intensity is the independent variable and the number of bubbles is the dependent variable.