laboursonline – MCQs, Mock Tests | Biology Biology MCQ Question

Cellular respiration is essentially a/an _________ process.

1. Oxidation
2. Reduction.
3. Redox.
4. None of the above.

✅ Correct Answer: 1

Breaking of terminal phosphate of ATP releases about _____ Kcal of energy.

1. 6.1
2. 6.3
3. 7.1
4. 7.3

✅ Correct Answer: 4

Final acceptor of electrons in respiratory chain is

1. NADH
2. Cytochrome a3
3. Water
4. Oxygen

✅ Correct Answer: 4

There are _______ types of nutrients needed by plants besides light to carry out photosynthesis

1. Two
2. Three
3. Four
4. Five

✅ Correct Answer: 2

The site/s where most of the uptake of water and minerals take place is/are

1. Root hairs
2. Root cells
3. Underground stem
4. All of these

✅ Correct Answer: 1

The uptake of water in plants involves

1. Active transport
2. Passive transport
3. Both of these
4. None of these

✅ Correct Answer: 2

The membrane of vacuoles is known as

1. Vacuoloplast
2. Tonoplast
3. Tanoplast
4. All of these

✅ Correct Answer: 2

The diffusion of ions along with water also takes place by mass flow system along the ______ path

1. Tonoplast
2. Apoplast
3. Symplast
4. Vacuolar

✅ Correct Answer: 2

Active transport is dependent on

1. Photosynthesis
2. Respiration
3. Photophosporylation
4. Photophosporylation

✅ Correct Answer: 2

In the root cells _______ pathway becomes discontinuous in the endodermis due to the presence of casparian strip.

1. Tonoplast
2. Apoplast
3. Symplast
4. Vacuolar

✅ Correct Answer: 2

Cytoplasmic strands that extend through pores in adjacent cell walls are known as

1. Pseudopods
2. Symplasts
3. Plasmodesmata
4. Pili

✅ Correct Answer: 3

In plants, water potential is determined by major factors.

1. Three
2. Four
3. Two
4. Five

✅ Correct Answer: 3

The pressure generated when water enters & inflates plant cells is called ______ potential

1. Water
2. Osmotic
3. Pressure
4. Solute

✅ Correct Answer: 3

The movement of water molecules from a region of higher water potential to a region of lower water potential (through membrane)

1. Deffusion
2. Osmosis
3. Active transport
4. None of these

✅ Correct Answer: 2

_______ potential is the measure of the change in water potential of a system due to the presence of solute molecules.

1. Osmotic
2. Pressure
3. Both of these
4. None of these

✅ Correct Answer: 1

Solute potential is always

1. plus ve
2. ? ve
3. plus ve or ? ve
4. Zero

✅ Correct Answer: 2

_______ component of cell wall has grreat affinity with water.

1. Lignin
2. Cellulose
3. Pectin
4. All of these

✅ Correct Answer: 4

Commonly in other plants than tall ones the speed of upward movement of water is

1. 8mh-1
2. 1 mh-1
3. 7 mh-1
4. 4 mh-1

✅ Correct Answer: 2

Exceptionally the positive hydrostatic pressure generated by root pressure is about

1. 600 Kpa
2. 800 Kpa
3. 1000 Kpa
4. 900 Kpa

✅ Correct Answer: 2

Cuticular transpiration is ______ of total transpiration

1. 6-8%
2. 5-7%
3. 7-9%
4. 4-6%

✅ Correct Answer: 2

All plants do not possess

1. Lenticels
2. Cuticle
3. Stomata
4. All of these

✅ Correct Answer: 1

Lenticular transpiration is _________ of total transpiration

1. 2-3%
2. 1-3%
3. 1-4%
4. 1-2%

✅ Correct Answer: 4

Aerating openings formed in the bark through which exchange of gases takes place and water is lost in the form of vapours are

1. Hydathods
2. Stomata
3. Lenticels
4. None of these

✅ Correct Answer: 3

Lenticels look like

1. A big pore
2. Stoma
3. Sponge
4. Cars or small protusions

✅ Correct Answer: 4

Stomatal transpiration is _____ of total transpiration

1. 90%
2. 91%
3. 93%
4. 95%

✅ Correct Answer: 1

They function as multisensory hydraulic valve

1. Lenticels
2. Guard cells
3. Hydathods
4. All of these

✅ Correct Answer: 2

There are _______ hypothesis which may explain opening and closing of stomata

1. One
2. Two
3. Three
4. Four

✅ Correct Answer: 2

Stomata open due to _____ of K+ into the guard cells from the surrounding epidermis

1. Diffusion
2. Active transport
3. Osmosis
4. All of these

✅ Correct Answer: 2

Low level of CO2 favours _____ of the stomata

1. Opening
2. Closure
3. Both of these
4. None of these

✅ Correct Answer: 1

The opening and closing of stomata is directly controlled by the

1. Temperature
2. pH
3. Light
4. None of these

✅ Correct Answer: 3

Symbionts which help plants in uptake of phosphorous and trace metals such as zinc and copper.

1. Bacteria
2. Viruses
3. Fungi
4. Cyanobacteria

✅ Correct Answer: 3

Transport of minerals from soil to epidermal cells of roots via carrier protein molcules along their concentration gradient is called:

1. Diffusion
2. Facilitated diffusion.
3. Passive transport.
4. Active transport.

✅ Correct Answer: 2

Pulling upward of water and dissolved minerals towards the leaves through the xylem tissue is called

1. Transpiration pull
2. Root pressure
3. Ascent of sap.
4. All of these

✅ Correct Answer: 1

Pressure flow theory was proposed by

1. H-Van Mohl
2. Dixon
3. Vander wall.
4. Earnst Munch

✅ Correct Answer: 4

A pressure created by active secretion of salts and other solutes from other cells into xylem sap is called

1. Transpiration pull
2. Root pressure
3. Osmotic pressure.
4. None of these

✅ Correct Answer: 2

Open circulatory system can contain

1. Red Blood Cells
2. White Blood Cells
3. Haemoglobin
4. All of these

✅ Correct Answer: 2

Which of the following is true about hearts of earthworm?

1. There are 5-7 pairs of heart.
2. They are present between 1-7th segments.
3. They are present lateral to the oesophagus.
4. They pump blood from ventral to dorsal vessel.

✅ Correct Answer: 3

Single circuit heart is found in

1. Fishes
2. Amphibians
3. Reptiles
4. Mammals

✅ Correct Answer: 1

It has been estimated that in a normal person plasma constitutes about ____ by vulume of blood.

1. 35%
2. 45%
3. 55%
4. 75%

✅ Correct Answer: 3

95% of the cytoplasm ofred blood cells is the

1. Antibodies
2. Haemoglobin
3. Enzymes
4. Proteins

✅ Correct Answer: 2

_______ give rise to macrophages, which destroy larger particles by phagocytosis.

1. Nautrophils
2. Basophila
3. Monocyte
4. Lymphocyte

✅ Correct Answer: 3

Which of the following are proteins in nature?

1. Antibodies
2. Interferons
3. Antitoxins
4. All of these

✅ Correct Answer: 4

Tricuspid valve is present

1. Between right atrium and right ventricle
2. Between left atrium and left ventricle
3. At base of pulmonary artery
4. At base of aorta

✅ Correct Answer: 1

QRS complex represents

1. Atrial systole
2. Ventricular systole
3. Atrial diastole
4. Ventricular diastole

✅ Correct Answer: 2

Which of the following have thickest walls?

1. Arteries
2. Veins
3. Capillaries
4. None of these

✅ Correct Answer: 1

Biology MCQ Quiz Hub

Biology MCQ Question - Transport