Class notes
Molecular Basis Of Inheritance
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Some examples from this set of practice questions
1.
How many pollen grains are formed from 5 microspore mother cells, when they undergo meiosis? a. 40 b. 10 c. 20 d. 30
Answer: answer:c
2.
Scientist while working with sea urchins, extracted their DNA, which is double-stranded showing 17% of the bases to be cytosine. Now, the percentage of the other three bases in this DNA are: a. G–34%, A–24.5%, T–24.5% b. G–17%, A–16.5%, T–32% c. G–17%, A–33%, T–33% d. G–8.5%, A–50%, T–24.5%
Answer: c
3.
Diaphragms are contraceptive devices used by females. Read the statements given below with respect to diaphragms and choose the correct statements. I. They act as physical barriers to sperm entry. II. They even prevent the spread of STIs. III. They are placed to cover the cervical region. IV. They act as spermicidal agents. V. Their use is associated with an increased urinary tract infection. a. I, II, III and IV b. II, III, IV and V c. II, IV and V d. I, III and V
Answer: d
4.
Fill in the missing blank „a‟ and „b‟ exhibiting the route of sperm transport. Seminiferous tubule
Answer: b
5.
A sedentary sea anemone gets attached to the shell lining of a hermit crab. The association is a) commensalism b) amensalism c) ectoparasitism
Answer: a
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