Cell Chemistry

Question 1

All living things get their energy through a reaction called

Answer 1

Respiration

Question 2

Where there is no oxygen, what’s the respiration process called

Answer 2

Anaerobic respiration

Question 3

Aerobic respiration equation

Answer 3

C6H12O6 (aq) + 6O2 (g)

——-> 6CO2 (g) + 6H2O (l) + energy

Question 4

Respiration is a chemical reaction which

Answer 4

Involves a sequence of reactions

Question 5

If carbon dioxide, water and chlorophyll are placed in a test tube in the sunlight

Answer 5

No reaction will occur because necessary enzymes are missing

Question 6

What is stomata

Answer 6

When the opening in plant leaves are designed to allow gaseous exchange without allowing excessive water loss

Question 7

What are the 2 things required for photosynthesis to occur

Answer 7

Light and chlorophyll

Question 8

The to materials that movie in and out a leaf through tiny pores of the leaf surface are

Answer 8

Oxygen and carbon dioxide

Question 9

List 3 uses of the energy stored in ATP

Answer 9

Cell reproduction
Cell growth
Transport of substances in and out of cell

Question 10

Two materials that move into a plant through the roots are

Answer 10

Minerals and water

Question 11

Name the product of anaerobic respiration in human muscle cells

Answer 11

Lactic acid

Question 12

Write the chemical equation for photosynthesis

Answer 12

6CO2 + 6H2O —-> C6H12O6 + 6O2

Question 13

What is the anaerobic equation

Answer 13

Glucose —-> lactic energy + energy

C6H12O6 —–> 2C3H6O3 + energy

Question 14

What are enzymes

Answer 14

Enzymes are complex protein molecules which act as biological catalyst. A catalyst is something which speeds up a chemical reaction without itself without being used up in the reaction.

Question 15

Characteristics of enzymes (6)

Answer 15

1. Protein nature
2. Biological catalysts
3. Act on reversible reaction
4. Action of enzymes is specific
5. Work best at a certain level of Ph and temperature
6. Action of enzymes in affected by inhibitor

Question 16

Temperature of enzymes

Answer 16

Each enzyme works best at a particular temperature, optimum temperature. At low temperature, enzymes become inactive.

Question 17

What happens to enzymes when the temperature is too high

Answer 17

Heat changes the shape of enzymes and their active sites become decreases their active sites, and they become denatured

Question 18

Fermentation equation

Answer 18

C6H12O6 —-> 2C2H5OH + 2CO2

Glucose —–> ethanol + carbon dioxide

Question 19

What is fermentation

Answer 19

the chemical breakdown of a substance by bacteria, yeasts, or other microorganisms, typically involving effervescence (bubbles and a liquid) and the giving off of heat.