Q.1. Multiple Choice Questions.
1. During respiration exchange of gases takes place in
a. trachea and larynx b. alveoli of lungs c. alveoli and throat d. throat and larynx
2. Blood from superior vena cava flows into
a. right atrium b. right ventricle c. left atrium d. left ventricle
3. The inter (cellular) energy reserve in autotrophs is
a. glycogen
b. protein c. starch d. fatty acid
4. What is the correct sequence of parts in human alimentary canal?
a. Mouth → Stomach → Small Intestine Oesophagus →Large intestine
b. Mouth → Oesophagus Stomach → Large Intestine → Small intestine
c. Mouth → Stomach → Oesophagus → Small Intestine → Large intestine
d. Mouth → Oesophagus Stomach Small Intestine Large intestine
4. Which is the first enzyme to mix with food in the digestive tract?
a. Pepsin b. Cellulase c. Amylase d. Trypsin
5. The opening and closing of the stomatal pore depends upon
a. Oxygen b. Temperature c. Water in guard cells d. Concentration of CO2 in stomata
6. Lack of oxygen in muscles often leads to cramps among cricketers. This results due to
a. Conversion of pyruvate to ethanol b. Conversion of pyruvate to glucose
c. Non-conversion of glucose to pyruvate d. Conversion of pyruvate to lactic acid
7. Rings of cartilage present in the throat ensure that
a. Air is filtered b. Air is at room temperature c. Air passage does not collapse d. Air is free of microbes
8. The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct option.
a. Pepsin b. Mucus c. Salivary Amylase d. Bile
9. The process by which Amoeba obtains food is called
a. Phagocytosis b. Assimilation c. Diffusion d. Absorption
10. In which part of the alimentary canal food is finally digested?
a. Stomach b. Mouth cavity c. Large intestine d. Small intestine
11. Exchange of genetic material takes place in
a. Vegetative reproduction b. Asexual reproduction c. Sexual reproduction d. Budding
12. Two pink colored flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of the cross
will be
a. Double fertilisation b. Self pollination c. Cross fertilisation d. No fertilization
13. The maleness of a child is determined by
a. the X chromosomes in the zygote
b. the Y chromosomes in the zygote
c. the cytoplasm of germ cell which determines the sex
d. sex is determined by chance
14. From the list given below, select the character which can be acquired but not inherited.
a. Color of the eye b. Color of skin c. Size of the body d. Nature of hair
15. The two version of a trait (character) which are bought in by the male and female gametes are situated on
a. Copies of the same chromosomes b. Two different chromosomes c. Sex chromosomes d. No chromosomes
16. In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants is
a. 1:3 b. 3:1 c. 1:1 d. 2:1
17. Products of anaerobic respiration in muscles are
a. Lactic acid and energy
b. Lactic acid, CO₂ and energy
18. The main function of ureter is to
c. Lactic acid, water, CO₂ and energy
d. Lactic acid, water and energy
a. Controls the pressure of urine in urinary bladder c. Filter blood and remove it to urine
b. Takes urine from kidney to urinary bladder
19. The green color in plants is due to the presence of
d. Connects the part of excretory system
a. Chlorophyll b. Carotene c. Xanthophyll
d. Starch
20. When air is blown from mouth into test tube containing lime water, the lime water gets turned into milky due to
the presence of
a. Oxygen
b. Carbon dioxide c. Nitrogen d. Water vapour