Biology Practice Question and Answer
8 Q: Sponges belong to phylum ______ of the animal kingdom.
1179 064c2509e9e9013486a756bb1
64c2509e9e9013486a756bb1- 1Echinodermatafalse
- 2Poriferatrue
- 3Aschelminthesfalse
- 4Molluscafalse
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Answer : 2. "Porifera"
Explanation :
1. Sponge belongs to Porifera phylum of the animal kingdom.
2. These are primitive multicellular animals. The study of sponges is known as para zoology.
3. Sponges are mostly irregular in shape and have radial symmetry.
4. The body of a sponge has two layers-
- Epidermis: This is the outer layer that helps move water in and out.
- Mesohyl: This is the middle layer which contains the cells of the sponge.
Q: An enzyme produced by HIV that allows the integration of HIV DNA into the host cell’s DNA is:
1175 0607ec5640372d8542895add5
607ec5640372d8542895add5- 1Integrasetrue
- 2Ligasefalse
- 3DNA gyrasefalse
- 4Helicasefalse
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Answer : 1. "Integrase"
Q: Which of the following organisms is responsible for sleeping sickness?
1168 0642ead7972ca731a991e7ccd
642ead7972ca731a991e7ccd- 1Algaefalse
- 2Protozoatrue
- 3Bacteriafalse
- 4Virusesfalse
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Answer : 2. "Protozoa"
Q: In biological terms, _______ is a relationship between two organisms in which one organism benefits and the other is unaffected.
1165 062bec68925fd051a656575ba
62bec68925fd051a656575ba- 1Parasitismfalse
- 2Mutualismfalse
- 3Amensalismfalse
- 4Commensalismtrue
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Answer : 4. "Commensalism"
Q: What is the osmolarity(in mO smolL–1) in the outer cortex and inner medullary region?
1165 063c8fa49bd6d90332092c5a3
63c8fa49bd6d90332092c5a3- 1300 and 900 respectivelyfalse
- 2600 and 300 respectivelyfalse
- 31200 and 300 respectivelyfalse
- 4300 and 1200 respectivelytrue
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Answer : 4. "300 and 1200 respectively"
Q: Which of the following statements is/are correct regarding the vegetative propagation of plants?
(1). Vegetative propagation produces a clonal population.
(2). Vegetative propagation helps in eliminating the virus.
(3). Vegetative propagation can be practiced most of the year.
Select the correct answer using the code given below.
1164 062ac7b21f5480112e46cb30d
62ac7b21f5480112e46cb30d- 11 and 3 onlytrue
- 21 , 2 and 3false
- 31 onlyfalse
- 42 and 3 onlyfalse
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Answer : 1. "1 and 3 only "
Q: Quinine medicine is used?
1163 0603635e824cd273bc4f0afee
603635e824cd273bc4f0afee- 1Cholerafalse
- 2jaundicefalse
- 3Malariatrue
- 4All of thesefalse
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Answer : 3. "Malaria"
Q: Which of the following enzymes is found in saliva of human body which breaks down starch into simple sugar?
1161 0641975a167ad957a978915b3
641975a167ad957a978915b3- 1Amylasetrue
- 2Trypsinfalse
- 3Pepsinfalse
- 4Reninfalse
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