General Science - Online Test
Q1. Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F2 segregation will show:
Answer : Option B
Explaination / Solution:
Two genes located very close on the chromosomal linkage map. Segregation of R and Y will not takes place due to linkage and passes to same gamete together but overall segregation can be expected as usual as dihybrid cross, 9:3:3:1.
Q2. Condition for producer equilibrium is:
Answer : Option C
Explaination / Solution:
No Explaination.
Q3. Semi-conservative replication of DNA was first demonstrated in
Answer : Option A
Explaination / Solution:
Semi-conservative replication of DNA was first demonstrated in bacterium Escherichia coli as it contain single chromosome within the cell without nuclear membrane.
Q4. For a stable molecule the value of bond order must be
Answer : Option B
Explaination / Solution:
Bond order∝Stability
Hence, for a stable molecule the value of bond order must be positive. When bond order is zero and negative the molecule will not exist.
Q5. A horizontal ring of radius r spins about it's axis with an angular velocity ω in a uniform magnetic field of magnitude B. Emf induced in the ring is
Answer : Option B
Explaination / Solution:
Induced EMF is zero because flux linked with it remains constant
Q6. Part of the electromagnetic spectrum to which 5890Ao - 5896Ao [double lines of sodium] belongs is
Answer : Option B
Explaination / Solution:
No Explaination.
Q7. Which of the following is a not a green house gas
Answer : Option D
Explaination / Solution:
Green house gas is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect.
Many greenhouse gases occur naturally in the atmosphere, such as carbon dioxide, methane, water vapor, and nitrous oxide, while others are synthetic. Those that are man-made include the chlorofluorocarbons (CFCs), hydrofluorocarbons (HFCs) and Perfluorocarbons (PFCs), as well as sulfur hexafluoride (SF6). Oxygen is not a green house gas.
Q8. The synthesis of 3 – octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are
Answer : Option D
Explaination / Solution:
NaNH2 is very strong base it will abstract H from alkyne and then substitution reaction will occur.
Q9. Photo sensitive chip used in a video camera is known
Answer : Option A
Explaination / Solution:
No Explaination.
Q10. Dough kept overnight in warm place becomes soft and spongy due to
Answer : Option C
Explaination / Solution:
Fermentation is a kind of anaerobic respiration in absence of oxygen to produce ethanol and carbon dioxide gas. Dough kept overnight in warm place becomes soft and spongy due to carbon dioxide gas released during fermentation.
