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

1. Lenticels and hydathodes are small pores with following common attributes..

They allow exchange of gases

Their opening and closing are not regulated

They always remain closed

They are found on the same organ of plants

2. Filtration, moistening and warming of air is the function of:

Nostrils

Pharynx

Trachea

Larynx

3. Respiration in plants

Occurs only during day

Is the characteristic of all living cells

Often requires CO₂

Results in the formation of vitamins

4. Pharynx of planaria opens in

Absent

Oesophagus

Stomach

Intestine

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

Blood vessels

Appendix

Lymph vessels

Capillaries

6. All of the following are correct about gas exchange in humans EXCEPT

Breathing rate is regulated by the medulla of the brain

Gas exchange occurs inalveoli

The purpose of the nose is to filter, warm, and moisten air

Hemoglobin carries oxygen and carbon dioxide in fairly equal amounts

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

The right ventricle pumps blood to the aorta.

The right atrium receives oxygenated blood from the lungs.

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

The left ventricle pumps blood to the entire body.

8. Hepatic and Pancreatic secretions are also stimulated by a hormone produced by the intestinal mucosa. The hormone is

Creatin

Pepsin

Gastrin

Secretin

9. Purkinje fibres mainly help in contraction of

Ventricles

Left ventricle

Right auricle

Aorta

10. During photorespiration is fixed by rubisco.

CO₂

O₂

11. Botanical name of Venus Fly Trap is

AIdovanda

Utricularaia

Nepenthes

Dionaea

12. Mitral valve in mammals guards the opening between

Left auricle and left ventricle

Stomach and intestine

Pulmonary vein an left auricle

Right auricle and right ventricle

13. Certain children are immune to certain diseases due to presence of

T-cells immune system

B-cells immune system

Memory cells

Phagocyte-antigen reactions

14. The opening between the right atrium and the right ventricle is guarded by a valve called _x_, whereas _y guards the opening of the left atrium and the left ventricle

x is tricuspid valve, y is bicuspid

x is semilunar valve, y is tricuspid valve

x is bicuspid valve, y is semilunar valve

x is bicuspid valve, y is tricuspid valve

15. Products of digestion are utilized during

Ingestion

Assimilation

Egestion

Absorption

16. In trees, death of protoplasts is essential for a vital function such as

water and food transport

Water transport

Food transport

Stomatal movements

17. Cardiac muscle is composed of

Unstriated muscle fibres

Striated, branched and voluntary muscle fibres

Unstriated (smooth), spindle shaped and voluntary muscle fibres

Striated, branched and involuntary muscle fibres

18. All of the following are true of the second line of defence EXCEPT

Inflammatory response

Increased production of histamine

Sneezing, redness, and itchy and runny nose and eyes

Stomach acid

19. During expiration in humans:

Diaphragm contracts

Intra-thoracic pressure increases

Intercostal contracts

Chest cavity volume increases

20. The carbohydrates synthesized in the leaves are transported through sieve tubes most commonly in the form of

Triose sugar

Sucrose

Glucose

Soluble starch

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