Biology Practice Question and Answer
8 4 Q:
6389d246c878936066e81fc3 4 Q:
609398276481f36316ea59d8 4 Q:
60363a16a0666c3c850615ad 4 Q:
5f0eddcc1090a0586540bc35 4 Q:
5ee35cfb55d51a0f6482c48f Answer : 1. "Thrombin "
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5f8fd4c1f28f4b47be4b9d1f 4 Q:
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Q: Heart attack occurs due to :
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6389d246c878936066e81fc3- 1Bacterial attack on the heartfalse
- 2Stopping of heart beatfalse
- 3Lack of blood supply to the heart itselftrue
- 4Impairment of heart’s working due to unknown reasonsfalse
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Answer : 3. "Lack of blood supply to the heart itself"
Q: The pH scale had been given by
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609398276481f36316ea59d8- 1Sornsentrue
- 2Bronstedfalse
- 3Arrheniusfalse
- 4Lewisfalse
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Answer : 1. "Sornsen"
Q: Which of the following is known as brown algae?
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60363a16a0666c3c850615ad- 1Laminariatrue
- 2Jesusfalse
- 3Spirogyrafalse
- 4Eulothrixfalse
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Answer : 1. "Laminaria"
Q: The function of Hemoglobin in the human body is to-
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5f0eddcc1090a0586540bc35- 1Carry oxygen to various tissuestrue
- 2Help excretionfalse
- 3Provide enzymes and hormonesfalse
- 4Provide amino acids for growthfalse
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Answer : 1. "Carry oxygen to various tissues "
Q: It causes clotting of blood –
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5ee35cfb55d51a0f6482c48f- 1Thrombintrue
- 2Hemoglobinfalse
- 3Pectinfalse
- 4All of the abovefalse
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Answer : 1. "Thrombin "
Explanation :
The substance that causes the clotting of blood is:
(A) Thrombin
Thrombin is an enzyme that plays a crucial role in the blood clotting process. It is responsible for converting fibrinogen, a soluble plasma protein, into insoluble fibrin threads. These fibrin threads form a mesh that helps in the clotting of blood, particularly at the site of injury or wound. Therefore, option (A) Thrombin is the correct answer.
Q: Spinach leaves have the highest quantity?
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5f7c0e0af16bc526c3199912- 1Vitaminfalse
- 2Irontrue
- 3Carbohydratefalse
- 4Fatfalse
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Answer : 2. "Iron"
Q: The total number of chromosomes in a human being is-
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5f8fd4c1f28f4b47be4b9d1f- 146true
- 248false
- 352false
- 4Indeterminatefalse
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Answer : 1. "46"
Q: Which of the following is true?
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5f4cd4ff9b1d69402e95b706- 1DNA is the genetic material in all the virusesfalse
- 2RNA is the genetic material in all the virusesfalse
- 3DNA is the genetic material in most of the organismtrue
- 4RNA is the genetic material in most viruses and bacteriafalse
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Answer : 3. "DNA is the genetic material in most of the organism "
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