Biology problems
- 1. Goitre is due to the deficiency of
Options- A. Calcium
- B. Zinc
- C. Selenium
- D. Iodine Discuss
Correct Answer: Iodine
- 2. Nissil granules occur in
Options- A. Eosinophil
- B. Glial cell
- C. Neuron
- D. Lymphocyte Discuss
Correct Answer: Neuron
- 3. Chemical Co- ordination in the body is brought out by
Options- A. Blood
- B. Lymph
- C. Enzymes
- D. Hormones Discuss
Correct Answer: Hormones
- 4. Melvin calvin got Noble Prize for his studies on
Options- A. Light reaction
- B. Plant hormones
- C. Carbon fixation
- D. Photons Discuss
Correct Answer: Carbon fixation
- 5. Plants are green because they
Options- A. Refract green light
- B. Absorbs green light
- C. Reflects green light
- D. Do not absorb ultra violet light Discuss
Correct Answer: Reflects green light
- 6. Scientist who discovered blood groups
Options- A. Krebs
- B. Pavlov
- C. Karl Landsteiner
- D. Darwin Discuss
Correct Answer: Karl Landsteiner
- 7. The enzyme that is necessary to bring about clotting of blood is
Options- A. peptidase
- B. amylase
- C. lipase
- D. thrombokinase Also asked in: AIEEE, GATE
Correct Answer: thrombokinase
Explanation:
The clotting of blood is a chain reaction initiated by the enzyme thrombokinase produced by the platelets. This causes prothrombin to be converted into thrombin in the presence of ion.
Thrombin combines with fibrinogen to produce fibrin threads which entangles the corpuscles to form the clot.
- 8. Spices detoriate after prolonged boiling
Options- A. The essential oils in the spices easily evaporate
- B. Spices are put in the pickels to add to the flavour
- C. Both A and B
- D. None Discuss
Correct Answer: The essential oils in the spices easily evaporate
- 9. Sleeping sickness in main is caused by the organism
Options- A. Plasmodium
- B. entamoeba
- C. giardia
- D. trypanosoma Discuss
Correct Answer: trypanosoma
Explanation:
Trypanasoma is a protozoan animal. It lives as a parasite in the blood and later invades the cerebrospinal fluid to cause the sleeping sickness. This parasite is transmitted by the Tsetse fly.
- 10. Metastasis is the process by which _________
Options- A. Cell divide rapidly under the influence of drugs
- B. Cancer cell spread through the blood or lymphatic system to other site or organs
- C. The Chromosome in cell nuclei are attached to the soindle before moving to the anaphase poles
- D. Cancer cells are successfully inhibited to divide any further Discuss
Correct Answer: Cancer cell spread through the blood or lymphatic system to other site or organs
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