Topic E: Respiration & Photosynthesis

Question 1

What is respiration?

Answer 1

this is a universal process in which energy is released from food molecules. Normally respiration requires oxygen and CO2 is the waste product.

Question 2

Word equation for respiration?

Answer 2

Glucose +Oxygen = carbon Dioxide + water + (energy)

Question 3

Aerobic respiration?

Answer 3

Respiration that occurs in the presence of oxygen.

Question 4

What is Anaerobic respiration?

Answer 4

Respiration when there is not an adiquate supply of oxygen.

Question 5

The equation for anaerobic respiration?

Answer 5

Glucose = lactic acid (+ small amount of energy)

Question 6

What does lactic acid do?

Answer 6

lactic acid is toxic and it accumulates in muscles. As it accumulates the muscle aches and develops a cramp

Question 7

Symbol equation for aerobic respiration?

Answer 7

C6H12O6 + 6O2 = 6CO2 + 6H2O (+energy)

Question 8

What is photosynthesis?

Answer 8

This is a vital bological process which all living organisms - animals and plants rely on. green plants can take in simple inorganic molecules such as carbon dioxide, water + nitrates to make complex energy - rich molecules such as carbohydrates.

Question 9

The bi-product of photosynthesis is ……..

Answer 9

Oxygen

Question 10

word equation for photosynthesis?

Answer 10

carbon dioxide + water ===(chlorophyll)=== glucose + oxygen

Question 11

worst light for photosynthesis is ……..

Answer 11

green light, blue is the best.

Question 12

The process of photosynthesis?

Answer 12

In photosynthesis plants take in CO2 + H20, using energy in the sunlight in which the chlorophyll traps in the chloroplasts. Using the energy in this sunlight these molecules are combined to make sugars. the bi-product of photosynthesis is oxygen.

Question 13

Symbol equation for photosynthesis?

Answer 13

6CO2 + 6H2O = C6H12O6 + 6O2

Question 14

experiment for photosynthesis?

Answer 14

Put a cutting in a beaker of water and count the bubbles that come out of the cutting in a set time. You can measure the following variables. Light intensity, light color, temperature, carbon dioxide, surface area of leaf, and water. Only one of these can be a variable at a time.

Question 15

Why do plants need carbon dioxide?

Answer 15

Plants need carbon dioxide in the process of photosynthesis to make food.

Question 16

Why do plants need light?

Answer 16

Plants need light to perform photosynthesis.

Question 17

Why do plants need a constant good temperature?

Answer 17

The reactions in the enzymes can only happen at certain temperatures.

Question 18

Adaptations of the leaf for photosynthesis?

Answer 18

Thin
Large Surface area
Air spaces
Stomata on underside 
Many chloroplasts is the palisade cells
palisade cells

Question 19

How has the structure of the leaf adapted for gas exchange?

Answer 19

• The flat thin shape gives it a high surface area which optimizes gas exchange.
• The internal structure of the leaf includes the spongy mesophyll that contains many air spaces which also increases the opportunity for gas exchange

Question 20

What is the roll of stomata in leaves?

Answer 20

The stomata regulates the level of water and CO2 that can leave or enter the leaf. When the stomata is open ( the Guard Cells are turgid) the amount of water loss is increased and the amount of Carbon Dioxide that enters is increased. The opposite happens when the stomata is closed (Guard Cells become flaccid). This regulates water movement and loss in the plant and also effects the rate of photosynthesis.

Question 21

What else do plants require for growth?

Answer 21

mineral ions

Question 22

What ions are needed for chlorophyll?

Answer 22

magnesium ions

Question 23

What ions are needed for amino acids?

Answer 23

nitrate ions.

Question 24

Which type of respiration produces more energy?

Answer 24

More energy is released during aerobic respiration.