Various biology questions

1

Pulmonary artery is different from pulmonary vein in having

Thick mscular walls

Large lumen

No endothelium

Valves

2

1

The first step of photosynthesis is:

Excitation of electron of chlorophyll by a photon of light

Ionization of water

Attachment of CO2 to 5 carbon sugar

Formation of ATP

3

1

Contraction of right ventricle pumps blood into

Pulmonary artery

Right auricle

Pulmonary vein

Dorsal aorta

4

1

Urine leaves the kidney through

Ureter

Urethra

Renal vein

Collecting duct

5

1

In which part of the leaf photosynthesis is maximum?

Palisade mesophyll

Upper epidermis

Spongy mesophyll

Lower epidermis

6

1

What is the optimum temperature for photosynthesis?

35 degree Celsius

45 degree Celsius

30 degree Celsius

35 degree Celsius

7

1

The electrons liberated during splitting of water during light reaction is used for

Reduction of carbondioxide

Reduction of NADP

Reduction of ATP

None

8

1

Absorption of digested food material occur in which part of alimentary canal?

Illeum

Duodenum

Jejunum

Colon

9

1

Which of the following property makes intestine good for absorption of digested food?

All of the above

Presence of Villi

Rich supply of blood capillaries

Thin epithelial covering

10

1

Which enzyme helps in breakdown of starch to maltose in small intestine?

Pancreatic amylase

Salivary amylase

Intestinal lipase

Pancreatic lipase

11

1

Gastric glands are located in which part of the stomach?

Inner epithelial lining

Outer epithelial lining

Cavity

Everywhere in stomach

12

1

Exchange of material between blood and interstitial fluid occurs only at the

Capillaries

Venule

Arteries

Veins

13

1

Amoeba removes excretory wastes through

Exosmosis

Diffusion

Active transport

Phhagocytosis

14

1

A tuft of artery in Bowman's capsule is called

Glomerulus

Distal tubule

Loop of Henle

proximal tubule

15

1

What is the amount of urine formed in a normal person per day?

1.5-2 litre

10 litre

6-7 litre

3-5 litre

16

1

Lenticels are present in

Bark of trees

Mesopyll of leaf

Epidermis of roots

None of the above

17

1

18

1

Excretion commonly involves

Removal of nitrogenous waste

Removal of all by-products during catabolism

Removal of all by-products during metabolism

All of the above

19

1

Dwarfism is a horomonal disorder due to

Deficiency of growth hormone

Excess of thyroxine

Deficiency of thyroxine

Deficiency of testosterone

20

1

The part of brain which tapers down to form spinal cord is

Medulla oblongata

Pons

Brain stem

Hypothalamus

21

1

Cerebrum is located _____ part of brain

Fore-front

Lower side

Extension of brain

None

22

1

The junction between the axon of one neurone and the dendrite of the next is called

Synapse

Constant bridge

A joint

Junction point

23

1

The seat of intelligence and voluntary actions in the brain is

Cerebrum

Cerebellum

Medulla Oblongata

Diencephalons

24

1

Which of these plant growth hormone is an inhibitor?

Cytokinin

Auxin

Ethylene

Absicic acid

25

1

The root of the plant is said to be

Positively geotropic

Negatively geotropic

positively thigmotropic

positively phototropic

26

1

The opening up of petals of dandelion flowers in morning in brighht light and closing in the evening when the light fades is an example of ____________________

27

1

A _____________________ is a cell ( or group of cells) in a sense organ which is sensitive to a particular type of stimuli

28

1

An _____________________ is a part of the body which can respond to a stimulus according to the instructions sent from the nervous system

29

1

The ____________ helps in maintaining posture and balance of the body

30

1

The longest fibre on the cell body of a neuron is called _______________

Name:
Note: