General Science - Online Test
Q1. The root like structure which help in anchorage and absorption of water in Bryophytes is called
Answer : Option A
Explaination / Solution:
Rhizoids are the root like structures present in Bryophytes that help in anchorage and absorption of water. They are thin hair like structure generally present at ventral surface of Bryophytes.
Q2. The chromosome having centromeres at one terminal end is called
Answer : Option A
Explaination / Solution:
A telocentric chromosome's centromere is located at the terminal end of the chromosome. Telomeres may extend from both ends of the chromosome.their shape is like i during anaphase. For example, the standard house mouse karyotype has only telocentric chromosomes.
Humans do not possess telocentric chromosomes
Q3. Following are the method of restricted random sampling except
Answer : Option C
Explaination / Solution:
This method is not a method of random sampling because some charecterstics are formed to select the population
Q4. The per capita forestland in the country is only _______.
Answer : Option B
Explaination / Solution:
The per capita forest land in the country is only 0.08 hectare against the requirement of 0.47 hectare to meet basic needs, resulting in an excess felling of about 15 million cubic metre forests over the permissible limit.
Q5. Number of nitrogenous bases in a Codon is
Answer : Option B
Explaination / Solution:
A codon is a sequence of 3 nitrogenous bases located on mRNA that will pair up with the anticodon of tRNA to make the polypeptide (protein) I. 64 codons can be obtained from four nitrogenous bases if arranged in group of 3.
Q6. A circuit containing a 80 mH inductor and a 60 μF capacitor in series is connected to a 230 V, 50 Hz supply. The resistance of the circuit is negligible. Average powers transferred to the inductor and to the capacitor are respectively
Answer : Option C
Explaination / Solution:
average power consumed by inductor is zero as actual voltage leads the current by
average power consumed by capacitor is zero as actual voltage lags the current by
Q7. A capacitor is charged and then made to discharge through a resistance. The time constant is τ. In what time will the potential difference across the capacitor decreases by 10%?
Answer : Option D
Explaination / Solution:
The capacitance of a capacitor is a constant.
Also, V q
The discharging equation for capacitor is
A similar equation can be written for potential difference.
Q8. The kinetic energy of a body executing S.H.M. is 1/3 of the potential energy. Then, the displacement of the body is x percent of the amplitude, where x is
Answer : Option D
Explaination / Solution:
No Explaination.
Q9. An ice cube floats on water because
Answer : Option D
Explaination / Solution:
Due to cage like structure of ice , for same mass of water and ice. Volume of ice is greater than that of water therefore density of ice is less than that of water.
Q10. The capacity to generate a whole plant from any cell/ explant is called
Answer : Option B
Explaination / Solution:
The ability to generate a whole plant from any cell/explant is called totipotency. Tissue culture method is used to generate whole plant from plant parts.
