Life process in Animals and Plants – Online MCQs Test – Biology MCAT

1. Of the processes which occur in leaves, the one which may lower their temperature (cooling effect) is

Transpiration

Photosynthesis

hydrolysis

Respiration

2. Insectivorous plants usually grow in soils which are deficient in

Ca/Mg

Nitrogen

Water

Organic matter

3. The valves of the heart are attached to papillary muscles by

Tendinae

Columnae carinae

Chordae tendinae

Pectinati muscles

4. Exchange of gases between blood and alveolar air in lungs occurs by:

Osmosis

Active transport

All of these

Simple diffusion

5. Saliva in our body is involved in all of the following functions except.

Chemical digestions

Softening of food

Mechanical digestion of food

Moistening of food

6. Wilting of leaves in hot weather is due to

Excess of transpiration as compared to water absorption

Excessive transpiration

Lack of water absorption

Excessive water absorption by roots

7. Cartilage is not found in:

Trachea

Larynx

Bronchioles

Bronchi

8. Which of the following theory gives the latest explanation for the closure of stomata?

Active K transport theory

Munch theory

Starch glucose theory

fluid mosaic theory

9. One of the following is an insectivorous plant

Balanophora

Drosera

Rafflesia

Orobanche

10. All of the following are part of the first line of defense EXCEPT

Leukocytes

Skin

CiIia

Stomach acid

11. Finger like process that arises form blind sac is called

Capillaries

Appendix

Blood vessels

Lymph vessels

12. Food vacuole of amoeba is formed by fusion of

None of them

Cell membrane and Pseudopodia

Cell membrane

Pseudopodia

13. Which reaction is carried out by ribulose?

Removal of carbon dioxide

Addition of carbon dioxide

Removal of oxygen

Addition of oxygen

14. Heart beat can be initiated by

Sinu-auricular node

Purkinje’s fibres

Atrio-ventricular node

Sodium ion

15. Which of the following statements is correct about the heart?

The left ventricle pumps blood to the entire body and right atrium receives oxygenated blood from the lungs

The right atrium receives oxygenated blood from the lungs.

The right ventricle pumps blood to the aorta.

The left ventricle pumps blood to the entire body.

16. The chief role of transpiration in plants is to cause

Rapid ascent of sap

Cooling of the plant

Loss of surplus water

Rapid rise of minerals

17. A charge that is related to inspiration in humans is:

Floor of buccal cavity is raised

Ribs move inward and downward

Lungs are inflated

Diaphragm becomes dome shaped

18. Which prevent trachea from collapsing

Cartilaginous rings

Muscles

Diaphragm.

Ribs

19. Nitrogen fixing bacteria are present in _____ of leguminous plants.

Leaflets

Root nodules

Seedlings

Stem

20. The total areas of absorption becomes large due to the enfolding of

Microvilli

Microvilli and Villi

Vessel

Villi

Life process in Animals and Plants (nutrition/ gaseous exchange/ transport)-Medical College Admission Test Preparation Notes