Biogernetics Flashcards Preview

GCSE Biology Paper 1 > Biogernetics > Flashcards

Flashcards in Biogernetics Deck (23)
Loading flashcards...
1

Is photosynthesis an endo or exothermic reaction

-Endothermic because it takes in light energy

2

where does photosyntheisis take place within the plant?

-the leaves

3

What is the word equation for photosynthesis

-carbon dioxide + water -> (in the preseance of light and chlorophyll) glucose + oxygen

4

What is the chemical formula for glucose.

C6H12O6

5

What happens when the light intensity is increased

If the light intensity is increadsed the rate of photosynthesis increases. The light intensity is the limiting factor when increasing the intesity increases the reaction

6

What happens when the light intensity is increased

If the light intensity is increadsed the rate of photosynthesis increases. The light intensity is the limiting factor when increasing the intesity increases the reaction

7

What happens when the carbon dioxide leves are increased?

the rate of photosynthesis increases. the carbon dioxide is the limiting factor as the carbon dioxide can change the rate of photosynthis

8

How can the amount of chlorophyl effect rate of photosynthis

-more photosynthesis occurs as there is more light

9

how can the temp effect the rate of photosynthesis

-enzymes will denature, so there is an optimum tempreture

10

What is glucose used for

-respiration
-produce insoluble storage molecule known as starch - useful as plant need to respire even when there is no light
-make cellulose to strengthen cell walls
-produce amino acids - this is for proteinsynthesis - they also need nitrate ions

11

Name 4 factors that effect photosynthesis

-temp
-amount of chlorophyll
-light
-amount of co2

12

Why are greenhouses used?

-increases light
-increases temp
-can increase co2
-increases photosynthesis

13

Why is respiration inportant

-energy for movement
-keep warm
-need energy for chemical reactions

14

What is the word equation for aerobic respiration?

-glucose + oxygen -> carbon dioxide + water + ENERGY

15

what is the chemical equation for aerobic respiration

C6H12O6 + O2 -> CO2 + H2O + energy

16

Where does anaerobic respiration take place?

-muscle cells - needed for contraction

17

When does anaerobic respiration take place?

-when there is a lack of oxygen

18

What is the word equation for anaerobic respiration in muscles

-glucose -> lactic acid + ENERGY

19

Which type of respiration releases more energy

-aerobic - this is as oxidation is incomplete in anaerobic respiration

20

What is the word equation for anaerobic respiration in plant and yeast cells

glucose -> ethatnol + carbon dioxide + ENERGY

21

What is fermentation

anearobic respiration in yeast cells

22

Where is fermentation used

-beer - ethanol produced by fermantation
-bread - creates bubbles and lets bread rise

23

What is our bodies responce to exersice

-respire anaerobicly
-aerobic respiration increase as there is more energy needed