Life Processes Worksheet-1

Life Processes Worksheet-1

1. The first step of photosynthesis is :

A. Ionisation of water

B. Attachment of CO₂ to 5-carbon sugar.

C. Excitation of electron of chlorophyll by a photon of light

D. Formation of ATP

2. Pulmonary artery is different from pulmonary vein in having

A. Large lumen                              B. Thick muscular walls

C. No endothelium                       D. Valves

3. Haemoglobin is a type of

A. Carbohydrate                            B. Skin pigment

C. Vitamin                                      D. Respiratory pigment

4. The basic functional unit of kidney is

A. Henle's loop                              B. Nephron

C. Nephridium                              D. Pyramid

5. Contraction of right ventricle pumps blood into

A. right auricle                              B. pulmonary artery

C. pulmonary vein                        D. dorsal aorta

6. The blood coming from lungs passes into

A. right auricle                              B. right ventricle

C. left auricle                                 D. left ventricle

7. Urine leaves the kidney through

A. Urethra                                      B. collecting duct

C. renal vein                                  D. Ureter

8. In plants, the transporting of food materials is done by

A. Xylem            B. Phloem          C. root hairs      D. palisade cells

9. The capillaries join to form

A. Arterioles      B. Arteries         C. Veins              D. Venules

10. Nitrogenous wastes are formed from the breakdown of

A. Ammonia                                  B. Fat

C. amino acids                              D. Water

Answer Key:

1. C
2. B
3. D
4. B
5. B
6. C
7. D
8. B
9. D
10. C