Biology MCQs Online Quiz Test 44

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Biology O level MCQs Questions Answers

Q.1: The distal blind end of the malpighian tubules bathes freely in——?

  1. Digestive tract
  2. Intestines
  3. Haemocoel
  4. Coelom

C

Q.2: Which of the following is a sentimentally arranged excretory system?

  1. Protonephridium
  2. Metanephridium
  3. Malpighian tubules
  4. Nephrons

B

Q.3: Excessive lactic acid is converted into —– by liver?

  1. Glucose
  2. Fructose
  3. Sucrose
  4. Glycogen

D

Q.4: Each human kidney receives —-% of total cardiac out put?

  1. 10%
  2. 20%
  3. 30%
  4. 40%

B

Q.5: On which of the following site the posterior pituitary hormone acts predominantly?

  1. Proximal convoluted tubule
  2. Descending limb of loop of Henle
  3. Ascending limb of loop of Henle
  4. Collecting tubules

D

Q.6: Animals that produce metabolic heat at low level and also absorb heat from the surroundings are called—–?

  1. Endotherms
  2. Ectotherms
  3. Heterotherms
  4. Homeotherms

C

Q.7: Which of the following marine fishes are considered direct descendents of fresh water ancestors?

  1. Hagfish
  2. Jelly Fish
  3. Star Fish
  4. Bony fishes

D

Q.8: Which excretory product in produced in plants during autotrophic mode of life?

  1. CO2
  2. H2O
  3. O2
  4. Both A and B

C

Q.9: Which of the following statement about conifers is correct?

  1. Stored excretory products in vacuoles, at a concentration that leads to crystal formation.
  2. Accumulate waste in leaves, which fall in autumn.
  3. Production of black wood in the center.
  4. Excrete some of the waste materials directly into soil, occasionally using them as a chemical weapon against other competing plants.

D

Q.10: Purine and pyrimidine metabolism results in production of——?

  1. Creatinine
  2. Trimethyamine oxide
  3. Xanthine
  4. None of these

C