General Science - Online Test
Q1. A vasectomy prevents the
Answer : Option D
Explaination / Solution:
Vasectomy is the surgical method of birth control in which vas deference of male is cut and tide to prevent release of sperm into vagina during coitus.
Q2. A capacitor of capacitance C = 2 is connected as shown in the figure. If the internal resistance of the cell is 0.5, the charge on the capacitor plates is
Answer : Option C
Explaination / Solution:
At steady state no current flows through the capacitor. The total resistance in the circuit =2+0.5=2.5Ω. Current I=V/R=2.5/2.5=1A. since no current flows through the 10 Ω resistor, the potential drop across it =0. The potential drop across the 2 Ω resistor = potential across the capacitor= I×2=2V.Charge on the capacitor Q= CV=(2μF)×(2V)=4μC.
Q3. The primary control of gene expression takes place at the level of
Answer : Option D
Explaination / Solution:
Expression of gene starts with transcription of particular segment of DNA, so primary control of gene expression takes place at the level of transcription of DNA into m-RNA.
Q4. The number of autosomes in human primary spermatocyte is
Answer : Option A
Explaination / Solution:
Primary spermatocytes are diploid and contain 23 pairs (46) of chromosomes. These chromosomes are divided into autosomes and sex chromosome. Sex chromosomes are XY and remaining chromosomes are called autosomes.
Q5. Chipko movement originated in
Answer : Option D
Explaination / Solution:
Chipko movement originated in Terhi Garwal of Utter Pradesh to protect the forest form contractors. In this movement women of village hug the tree to prevent it from cutting.
Q6. Inert pair effect of p-block elements is due to the
Answer : Option D
Explaination / Solution:
The inert pair effect is nothing but the extra stability concept. Generally P-block elements shows variable valiancy which is equal to the maximum oxidation (Group oxidation state) state of that group of p-block elements, p block elements may show other oxidation state i.e.+2.
Group oxidation state +4 is obtained when electrons are lost from both ns and np levels,
+2 oxidation state is obtained while only np level electrons are lost due to extra stability and poor shielding of ns electron which are called inert pair. The effect is the inert effect
Q7. Which of the following is not the character of statistics in plural form
Answer : Option A
Explaination / Solution:
No Explaination.
Q8. Positive and negative point charges of equal magnitude are kept at ( 0,0,a/2) and (0,0,-a/2) respectively. The work done by the electric field when another positive point charge is moved from (-a,0,0) to (0,a,0) is
Answer : Option A
Explaination / Solution:
+Q charge is moving on equatorial line of dipole as shown in figure, since on equatorial line V=0 So W=0
+Q charge is moving on equatorial line of dipole as shown in figure, since on equatorial line V=0 So W=0
Q9. Material used for study of mitotic cell division in class room is
Answer : Option A
Explaination / Solution:
The most common material used for study of mitosis cell division in class room is onion root and broad bean root tip. They can be grown quickly and in all seasons. Also they are esier to handle with and divisional stages are completed quickly.
Q10. A grown up cell divides when a maximum size is attained and which disturb the
Answer : Option B
Explaination / Solution:
A disturbance in the nucleoplasmic ratio will cause the cell to divide and attain stable ration which is 1. If it is less or more than 1 the cell becomes unstable and divides agin.
