Respiration

Question 1

Who needs energy?Why?

Answer 1

Living and non-living things.To do work.

Question 2

What does our body need energy for?

Answer 2

To carry out various activities.

Question 3

Why do plants need energy?

Answer 3

To carry out different procceses like:
* growth
* absorption of water and
* photosynthesis.

Question 4

Where do we get energy from?

Answer 4

Food.

Question 5

In what form does food store energy?

Answer 5

chemical energy.

Question 6

Define respiration.

Answer 6

The procces by wich food (glucose) is broken down by oxgen (oxidised) to release energy, carbon dioxide and water.

Question 7

How is chemical energy in food being used?

Answer 7

The chemical energy in food is released by oxidation and the released energy is stored in the form of special molecules called adenosine triphosphate (ATP).

Question 8

What gets liberated from food during oxygen?

Answer 8

• Energy
• Carbon Dioxide and
• Water.

Question 9

When does the process of respiration take place?

Answer 9

All the time.

Question 10

How can respiration be represented?

Answer 10

Digested food(glucose) +Oxygen ——–) Energy+Waste products(water and carbondioxide)

Question 11

What are the charecteristics of respiration?

Answer 11

1. Food is broken down into simpler forms.
2. Energy is produced.
3. Exchange of gases occurs. Oxygen is used up and Carbon dioxide is given out.

Question 12

where does the charecteristics of respiration take place?

Answer 12

In all living cells of a plant or an animal.

Question 13

What is the types of respiration based on?

Answer 13

Whether oxygen is used up or not.

Question 14

Define aerobic respiration.

Answer 14

The process in which oxidation of food takes place in the presence of oxygen is known as aerobic respiration.

Question 15

Write the formula of aerobic respiration.

Answer 15

Digestested food (glucose) + oxygen ——-) energy(38 ATP)+carbon dioxide+ water

Question 16

IN aerobic respiration does the digested food (glucose) get completely oxidised?What happens as a result?

Answer 16

Yes,carbon dioxide and water are produced.

Question 17

How many ATP molecules are released from the oxidation of 1 glucose molecule?

Aerobic

Answer 17

38

Question 18

Which type of respiration do most organisms use?Why?

Answer 18

Aerobic respiration.Because they require oxygen.

Question 19

Define anaerobic respiration.

Answer 19

The respiration process in the absence of oxygen is known as anaerobic respiration.

Question 19

Give examples of organisms which use anaerobic respiration.

Answer 19

yeast and some bacteria.

Question 20

Is the glucose completely oxidised in anaerobic respiration?Is water produced?What is produced instead when glucose is oxidised?

Answer 20

No.no.ethyl alcohol +carbon dioxide+energy.

Question 20

Write the formula of anaerobic respiration.

Answer 20

Food(glucose)——–)ethyl alcohol+carbon dioxide+energy(2 ATP)

Question 21

In anaerobic respiration how many ATP molecules are released with the oxygen of 1 glucose molecule?

Answer 21

2

Question 22

What happens when we burn wood or petrol?

Answer 22

Combustion occurs,oxygen is used up amd carbon dioxide is given out, it is similar to respiration.

Question 23

Whaat are the steps of respiration in plants?

Answer 23

* Oxygen is taken in through the stomata (small on the surface of leaves) * Stored food(glucose) is oxidised by the obsorbed oxygen. * Energy in the form of ATP molecules is produced. * Carbon dioxide and water is produced as end products, by the oxidation of food.

Question 24

Where does cellular respiration occur in plants and animals.

Answer 24

mitochondria.

Question 24

Do plants have the specific organs for breathing?

Answer 24

No.

Question 25

How does the exchange of gases occur in plants?

Answer 25

Diffusion.

Question 26

The diffusion of gases occur in what structures?

Answer 26

* the stomata in the leaf- minute opening on the leaf surface. * the lenticels-openings in old stems. * the general surface of the root.

Question 27

How does diffusion occur in aquatic animals?

Answer 27

The gases diffuse through the moist body surface.

Question 28

What is the stomatal opening surrounded by?

Answer 28

Guard cells shaped like kidney shaped beans.

Question 29

What does the guard cells contain?What does "this object" do?

Answer 29

Chlorophyll, which traps sunlight which helps carry out photosynthesis.

Question 30

What are guards cells surrounded by?

Answer 30

Subsidairy cells.

Question 31

Define stomatal apparatus.

Answer 31

The whole structure containing of the opening, the guard cells and the subsidairy cells.

Question 32

# Who am I? Respiration which takes place without oxygen.

Answer 32

Anaerobic respiration.

Question 33

# Who am I? Respiration which takes place with oxygen.

Answer 33

Aerobic

Question 34

# Give examples of the following. (i) Anaerobic respiration. (ii)Aerobic respiration.

Answer 34

(i) Yeast and some bacteria. (ii)Animals and plants.

Question 35

Can germinating seed respire with the absence of oxygen?

Answer 35

Yes, but only for some time.

Question 36

Define fermentation.

Answer 36

The process by which food molecules(sugars) are incompletely broken down into ethyl alcohol and carbon dioxide.

Question 37

# True/False. Energy released in anarobic respiration **>** Energy in aerobic respiration.

Answer 37

FALSE!!!

Question 38

# FIll in the blanks. The ability of ....... and ........ to carry out ................. respiration has employed the making of ....... like ............. ,........ and.......... .

Answer 38

yeast bacteria anaerobic food items yogurt bread and vinegar.

Question 39

CO2 is absorbed by .......

Answer 39

Potassium hydroxide(KOH)

Question 40

During photosynthesis .......... is obtained from the Sun. During respiration ....... is produced in the form of ....... ..............,

Answer 40

energy energy ATP molecules.

Question 41

IN plants does respiration and photosynthesis take place simultaneously?

Answer 41

Yes.

Question 42

What is taken in and given out in.... (i) Respiration (ii)Photosynthesis

Answer 42

(i) Oxygen in taken in while caron dioxide is given out. (ii) Carbon dioxide is taken in while oxygen is given out.

Question 43

# Spell: [əˌdɛnəsiːn trʌɪˈfɒsfeɪt]

Answer 43

Adenosine triphosphate

Question 44

Why do we need to grow plants?

Answer 44

We need to grow plants to balance the environment, because it is the only source of oxygen for human beings, they are the only things in nature which can convert carbon dioxide to oxygen, therefore **plants** are known as lungs of the earth.