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1009 available questions

Biology · Question 391

The radial symmetry is found in the animals of which of the following?

  1. Protozoa
  2. Porifera
  3. Cnidaria
  4. All of these
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Correct answer: C

Cnidaria

Biology · Question 392

According to Ivanovski what are soluble living germs

  1. Bacteria
  2. Viruses
  3. Fungi
  4. Both A and B
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Correct answer: A

Bacteria

Biology · Question 393

Enzymes work by which of the following?

  1. increasing the activation energy
  2. reducing the activation energy
  3. making exergonic reactions endergonic
  4. making endergoinic reactions exergonic
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Correct answer: B

reducing the activation energy

Biology · Question 394

Which one of the following is not the characteristic of viruses

  1. They do not respire.
  2. They do not excrete
  3. They do not have the ability to reproduce
  4. They can be crystallized
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Correct answer: C

They do not have the ability to reproduce

Biology · Question 395

When two or more clearly differet phenotypes exists in the same population of species, the phenomenon is called?

  1. replication
  2. polymorphism
  3. gene linkage
  4. gene expression
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Correct answer: B

polymorphism

Biology · Question 396

Phtosystem II has molecules which absorbs maximum light of?

  1. 680 nm
  2. 100 nm
  3. 700 nm
  4. 670 nm
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Correct answer: A

680 nm

Biology · Question 397

A condition characterized by hypothyroidism and enlargement of thyroid gland is known as:

  1. Graves disease
  2. Gigantism
  3. Goiter
  4. Exophthalmia
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Correct answer: C

Goiter

Biology · Question 398

Which of the following hormones is responsible for reducing the blood glucose level?

  1. Thyroid hormone
  2. Insulin hormone
  3. Glucagon hormone
  4. ADH hormone
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Correct answer: B

Insulin hormone

Biology · Question 399

Which of the following best describe competitive inhibitors?

  1. Do occupy active site
  2. Destory the structure of enzyme
  3. Resemble structurally with substrate
  4. Both B and C
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Correct answer: D

Both B and C

Biology · Question 400

The hollow elongated tube formed when muscle fiber penetrates deep into the cell is known as:

  1. A tubule
  2. M tubule
  3. T tubule
  4. Z tubule
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Correct answer: C

T tubule