General Science - Online Test
Q1.
In constructing a large mobile, an artist hangs an aluminum sphere of mass 6.0 kg from a vertical steel wire 0.50 m long and 2.5 in cross-sectional area. On the bottom of the sphere he attaches a similar steel wire, from which he hangs a brass cube of mass 10.0 kg. Compute the tensile strain.
Answer : Option D
Explaination / Solution:
No Explaination.
Q2. EtbR fluoresces in UV light because
Answer : Option A
Explaination / Solution:
Ethidium bromide is a molecule commonly used to visualize DNA in agarose gel electrophoresis experiments. It both binds to DNA and fluoresces under the proper conditions. Ethidium bromide is known as an intercalating agent. The flat structure of ethidium bromide allows it to intercalate, or insert, between nitrogenous bases of a DNA molecule. This interaction is especially useful because of ethidium bromide's second characteristic. When it is exposed to ultraviolet light, ethidium bromide fluoresces. Thus, this chemical provides both a means of tagging DNA molecules and a means of visualizing them.
Q3. Diabetes insipidus is caused due to :
Answer : Option D
Explaination / Solution:
Diabetes insipidus is rate variety of diabetes characterized by excessive thrust and excretion of large amount of urine. It is caused due to reduced secretion of antidiuretic hormone (ADH) or vasopressin hormone.
Q4.
A 1.0-mol sample of an ideal gas is kept at 0.0C during an expansion from 3.0 L to 10.0 L. How much energy transfer by heat occurs with the surroundings in this process?
Answer : Option C
Explaination / Solution:
in isothermal process
hence
Q5. Big bang theory try to explain
Answer : Option A
Explaination / Solution:
The Big Bang is a scientific theory about how the universe started, and then made the stars and galaxies we see today.
It tries to explain the origin of universe. It told us about the singular large explosion unimaginable in physical term.
Q6. Calculate the total number of electrons present in 1.4 g of dinitrogen gas.
Answer : Option C
Explaination / Solution:
molesofN2=1.428=0.05molAnd1moleofN2=6.022×1023moleculesofN2And1moleculeofN2has14electronstotalnumberofelectronsin1.4gofN2=0.5×6.022×1023×14=4.214×1023
Q7. RNA guides the biosynthesis of
Answer : Option D
Explaination / Solution:
RNA guides the biosynthesis of proteins.
Q8. The term demographic transition refers to
Answer : Option C
Explaination / Solution:
No Explaination.
Q9. Quiescent centre is found in the plant at
Answer : Option C
Explaination / Solution:
Quiescent centre is a small group of cells with low mitotic activity. It is found at the tips of growing roots in the root meristem.
Q10. Using the Bohr’s model Calculate the orbital period of the electron in a hydrogen atom in the n = 1, 2, and 3 levels.
Answer : Option A
Explaination / Solution:
No Explaination.
