Biology Practice Question and Answer
8 Q: Which one is the first heart sound?
1093 063c8f9eb8731ac33279f097b
63c8f9eb8731ac33279f097b- 1Lub during closure semilunar valvesfalse
- 2Lub during closure of atrio-ventricular valvestrue
- 3Dub during closure of atrio- ventricular valvesfalse
- 4Dub during closure of semilunarvalevesfalse
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Answer : 2. "Lub during closure of atrio-ventricular valves"
Q: Who among the following developed the Cholera vaccine in 1885?
1087 064c21aa1a919c8488e0cbe42
64c21aa1a919c8488e0cbe42- 1Edward Jennerfalse
- 2Jaime Ferrántrue
- 3Jonas Salkfalse
- 4Leon Calmettefalse
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Answer : 2. "Jaime Ferrán"
Explanation :
1. The credit for developing the cholera vaccine in 1885 goes to Spanish-French bacteriologist and hygienist Jaime Ferrán.
2. He tested a live attenuated bacterial vaccine during a cholera epidemic in Valencia.
3. Jaime Ferrán's vaccine successfully protected people from cholera and began to be used in vaccination programs around the world.
Q: An enzyme produced by HIV that allows the integration of HIV DNA into the host cell’s DNA is:
1086 0607ec5640372d8542895add5
607ec5640372d8542895add5- 1Integrasetrue
- 2Ligasefalse
- 3DNA gyrasefalse
- 4Helicasefalse
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Answer : 1. "Integrase"
Q: Xerophthalmia is caused due to the deficiency of vitamin ________.
1084 062becdd7a00ee61c3117dd51
62becdd7a00ee61c3117dd51- 1Atrue
- 2Kfalse
- 3Cfalse
- 4Dfalse
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Answer : 1. "A"
Q: Controlling mosquito using chemical substances is called?
1082 0603635939792c13b2854d77a
603635939792c13b2854d77a- 1Bio-controlfalse
- 2Chemical Controltrue
- 3bothfalse
- 4None of thesefalse
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Answer : 2. "Chemical Control"
Q: Quinine medicine is used?
1079 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?
1077 0641975a167ad957a978915b3
641975a167ad957a978915b3- 1Amylasetrue
- 2Trypsinfalse
- 3Pepsinfalse
- 4Reninfalse
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Answer : 1. "Amylase "
Q: In biological terms, _______ is a relationship between two organisms in which one organism benefits and the other is unaffected.
1074 062bec68925fd051a656575ba
62bec68925fd051a656575ba- 1Parasitismfalse
- 2Mutualismfalse
- 3Amensalismfalse
- 4Commensalismtrue
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