General-Studies Quiz For FCI Phase I 2022- 21st October

Q1. White blood cells act
(a) as a defence against infection
(b) as source of energy
(c) as a clotting agent
(d) as a medium for oxygen transport from lungs to tissues
(e) None of the above

Q2. In living cells synthesis of ribonucleic acid (RNA) takes place in:
(a) Cytoplasm
(b) Nucleus
(c) Golgi body
(d) Nephron
(e) None of the above

Q3. Due to the discovery of one of the following in 1980, the evolution was termed as RNA world:
(a) RNA present in some viruses as genetic material
(b) RNA has enzymatic property
(c) RNA is found in all living cells
(d) RNA is found to be associated with protein synthesis
(e) None of the above

Q4. Which one of the following elements is used in pencil-lead?
(a) Zinc
(b) Lead
(c) Carbon (Graphite)
(d) Tin
(e) None of the above

Q5. when pure water boils vigorously, the bubbles that rise to the surface are composed primarily of
(a) air
(b) hydogen
(c) hydrogen and oxygen
(d) water vapour
(e) None of the above

Q6. Which compound, when dissolved in water, conducts electricity and forms a basic solution?
(a) HCI
(b) CH3COOH
(c) CH3OH
(d) NaOH
(e) None of the above

Q7. The oxygen rich blood rich from lungs comes to the heart in
(a) Left atrium
(b) Right atrium
(c) Right ventricle
(d) Left ventricle
(e) None of the above

Q8. The lipids and proteins essential for the formation of cell membrane are synthesized in
(a) Golgi bodies
(b) Mitochondria
(c) Endoplasmic reticulum
(d) Lysosomes
(e) None of the above

Q9. The cell organelle storing substances like starch, oil and proteins is
(a) Vacuole
(b) Lysosome
(c) Plastid
(d) Golgi body
(e) None of the above

Q10. Lipids and proteins constituting the cell membrane are synthesized at:
(a) endoplasmic reticulum
(b) mitochondria
(c) Golgi apparatus
(d) Lysosome
(e) None of the above

Solutions

S1.Ans. (a)
Sol. White blood cells destroy foreign proteins (bodies) e.g pathogens by the process of phagocytosis and in this way protects the body from infection.

S2.Ans. (b)
Sol. The process of copying genetic information from one strand of the DNA into RNA is termed as transcription. It takes place in nucleus with the help of RNA polymerase.

S3.Ans. (b)
Sol. RNA was the first genetic material. There is now enough evidence to suggest that essential life processes (such as metabolism, translation, splicing, etc.) evolved around RNA. RNA used to act as a genetic material as well as a catalyst. But, RNA being a catalyst was reactive and hence unstable. Therefore, DNA has evolved from RNA with chemical modifications that make it more stable.

S4.Ans. (c)
Sol. The core of a pencil does not contain lead and never has. Pencils contain a form of solid carbon known as graphite.

S5.Ans. (d)
Sol. When you first start to boil water, the bubbles are basically air bubbles. These are bubbles formed from the dissolved gases in water. The solubility of gases decreases when the temperature is increased, and that is why the dissolved air bubbles come out from the water. Then, as the boiling point of water is reached, water vapor starts to form in the form of bubbles.

S6.Ans. (d)
Sol. Strong electrolyte is an ionic compound that dissociates completely in water & conducts electricity. From the given options, only NaOH and HCl are strong electrolytes and NaOH alone would form a basic solution when dissolved in water. NaOH is a strong electrolyte. It is an alkali-a water soluble strong base.

S7.Ans. (a)
Sol. The Oxygen rich blood from lungs comes to the heart in left atrium, the left chamber of the heart.

S8.Ans. (c)
Sol. The proteins are synthesized with the help of ribosome on RER and lipids are synthesized by SER. Post translational modifications take place in golgi body which are then sent to their respective destinations with the help of vesicles.

S9.Ans. (c)
Sol. Plastid is a double-membrane organelle found in plants, algae, and some other eukaryotic organisms. They are of different types such as chloroplasts, chromoplasts, gerontoplasts, & leucoplasts (used for storing starch and fats).

S10.Ans. (a)
Sol. The endoplasmic reticulum bearing ribosomes on their surface called rough endoplasmic reticlum (RER) which are actively involved in protein synthesis. The smooth endoplasmic retriculum (SER) is the major site for synthesis of lipid. In animal cells, steroidal hormones syntherized in SER.