General Science - Online Test
Q1. Electroporation helps in the introduction of foreign DNA into target organism by
Answer : Option D
Explaination / Solution:
Electroporation, or electropermeabilization, is a microbiology technique in which an electrical field is applied to cells in order to increase the permeability of the cell membrane, allowing chemicals, drugs, or DNA to be introduced into the cell.
In microbiology, the process of electroporation is often used to transform bacteria, yeast, or plant protoplasts by introducing new coding DNA.
Q2. What are the unlabeled a, b & c in the given flow chart ?
Answer : Option D
Explaination / Solution:
Renin convert angiotensin I to angiotensin II which activates adrenal cortex to release aldosterone. Aldosterone helps to reabsorption of sodium and water from DCT.
Q3. A cylinder with a movable piston contains 3 moles of hydrogen at standard temperature and pressure. The walls of the cylinder are made of a heat insulator, and the piston is insulated by having a pile of sand on it. By what factor does the pressure of the gas increase if the gas is compressed to half its original volume?
Answer : Option A
Explaination / Solution:
PVγ=ConstPVγ=Pf(V2)γforH2,γ=1.4Pf=P21.4=2.64P
Q4. The process of evolution of different species in a given geographical area starting from a point and radiating to other geographical area is called
Answer : Option B
Explaination / Solution:
In evolutionary biology, adaptive radiation is a process in which organisms diversify rapidly from an ancestral species into a multitude of new forms, particularly when a change in the environment makes new resources available, creates new challenges, or opens new environmental niches.
Q5.
At, the density of a certain oxide of a gas at 2 bar is same as that of dinitrogen at 5 bar. What is the molecular mass of the oxide?
Answer : Option C
Explaination / Solution:
PV=(m/M)RT
Q6. Hydrolysis of protein into peptone is brought about by.
Answer : Option C
Explaination / Solution:
Pepsin enzyme leads hydrolysis of proteins.
Q7. Which of the following statements is correct?
Answer : Option A
Explaination / Solution:
Ice and water kept in a perfectly insulated thermos flask (no exchange of heat between its contents and the surroundings) at 273K and the atmospheric pressure are in equilibrium state and the system shows interesting characteristic features. We observe that the mass of ice and water do not change with time and the temperature remains constant.
Q8. The shape of guard cells in grasses is
Answer : Option B
Explaination / Solution:
Dumb-bell-shaped guard cells are found in grasses. Dumb-bell shaped guard cells are more advanced in evolutionary terms and more efficient physiologically because guard cells of grasses require fewer solutes and less water to achieve a given unit increase in aperture.
Q9. In comparison to atomic size in Rutherford’s model, the size of the atom in Thomson’s model is
Answer : Option D
Explaination / Solution:
No Explaination.
Q10. Choose the correct sequence of taxonomic categories in descending order
Answer : Option A
Explaination / Solution:
The correct sequence of taxonomic categories form higher to lower are Division-Class-Order-Family-Genus-Species.
