Life Processes MCQ Online Test

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MCQ on Life Processes for Students

During the process of respiration :

1. enzymes are synthesized

2. large number of ATP molecules are utilized

3. organic substances are utilized

4. fats never participate

Option 3 – organic substances are utilized

In anaerobic respiration :

1. glycolysis does not take place

2. water molecule is split

3. oxygen acts as a final electron acceptor

4. ethyl alcohol is the common end product

Option 4 – ethyl alcohol is the common end product

Oxidative phosphorylation is the formation of :

1. ADP during aerobic respiration

2. NADP during anaerobic respiration

3. ATP during aerobic respiration

4. ATP during presence of sun light

Option 3 – ATP during aerobic respiration

Conversion of glucose to pyruvic acid yields a net gain of :

1.2 molecules of ATP

2. 36 molecules of ATP

3. 4 molecules of ATP

4. 38 molecules of ATP

Option 1 – 2 molecules of ATP

Maximum rate of respiration takes place :

1. 10°C -25°C

2.30°C -40°C

3. 60°C-100°C

4. more than 100°C

Option 2 – 30°C -40°C

Respiration differs from combustion in :

1. release of heat all at once

2. release of heat at several stages

3. initial burning of the substance

4. initial supply of oxygen

Option 2 – release of heat at several stages

In one of the following is observed only aerobic respiration :

1. muscles

2. yeast

3. tetanus bacteria

4. germinating seeds

Option 4 – germinating seeds

For the oxidation, carbohydrates should be in the form of :

1. starch

2. cellulose

3. glucose

4. fats

Option 3 – glucose

Cellular respiration takes place in the

1. cytoplasm

2. nucleus

3. chloroplast

4. mitochondria

Option 4 – mitochondria

Respiration takes place in presence of :

1. light

2. chlorophyll

3. optimum temperature

4. moisture

Option 3 – optimum temperature

Single celled organisms take in oxygen from:

1. air

2. soil

3. water

4. both air and water

Option 3 – water

Terrestrial animals take in oxygen from :

1. pond

2. river

3. air

4. sea

Option 3 – air

Respiratory organs in cockroach are :

1. blood vessels

2. mucous glands

3. gills

4. trachea

Option 4 – trachea

Respiration in amoeba occurs by :

1. transpiration

2. osmosis

3. diffusion

4. inhalation

Option 3 – diffusion

Cutaneous respiration occurs in :

1. cockroach

2. salamander

3. crab

4. parrot

Option 2 – salamander

Skin has no respiratory role in :

1. earthworm

2. lizard

3. frog

4. salamander

Option 2 – lizard

Coelomic fluid in earthworm comes out through :

1. mouth

2. dorsal pores

3. pulmonary vein

4. anus

Option 2 – dorsal pores

Amphibious animal

1. leech

2. earthworm

3. frog

4. cockroach

Option 3 – frog

Tracheae are found in :

1. megascolex

2. bony fish

3. salamander

4. butterfly

Option 4 – butterfly

In cockroach, the tracheal system opens to out side through :

1. anus

2. mouth

3. dorsal pores

4. stigmata

Option 4 – stigmata

The energy released in respiration is obtained from

1. Synthesis of carbohydrates

2. Cellular functions

3. Oxidation of glucose

4. Synthesis of proteins

Option 3 – Oxidation of glucose

The energy utilised in photosynthesis is obtained from

1. Sunlight

2. Oxidation of glucose

3. Breakdown of proteins

4. Breakdown of glucose

Option 1 – Sunlight

Oxidative phosphorylation occurs in

1. Chloroplast

2. Mitochondria

3. Cytoplasm

4. Nucleus

Option 2 – Mitochondria

Photophosphorylation occurs in

1. Mitochondria

2. Cytoplasm

3. Chloroplast

4. Nucleus

Option 3 – Chloroplast

Synthesis of new molecules in the cell requires the following energy

1. Mechanical

2. Electrical

3. ATP

4. Heat

Option 3 – ATP

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