General Science - Online Test
Q1. The sensitivity of fingerprinting technique has been increased by use of
Answer : Option C
Explaination / Solution:
The sensitivity of fingerprinting technique has been increased by use of Polymerase chain reaction (PCR). After that single cell obtained from organism is enough for this technique.
Q2. Inner cell mass (embryo) contain certain cells that contain cells called stem cells which have potency to
Answer : Option A
Explaination / Solution:
The inner cell mass contain certain cells that contain cells called stem cells which have potency to give rise all the tissues and organs. Now a day’s stem cells are preserved for future use.
Q3. If it is said that per capita in India is Rs.18000 per annum it does not mean that income of each and every Indian is Rs. 18000 per annum.Which of the drawback of statistics is highlighted in this example
Answer : Option C
Explaination / Solution:
No Explaination.
Q4. The percentage of p-character in the orbitals forming P - P bonds in is
Answer : Option C
Explaination / Solution:
obitals forming P-P bond is hybridised therefore have 75% p character.
Q5. Which of the following sentences is true about the evolutionary process?
Answer : Option A
Explaination / Solution:
Evolutionary process is totally different from human progress.
Evolution leads to creation of complex organism. It does not lead to creation of better organism. For e.g, we are not better than the amoeba, we are just complex than amoeba.
There is no real progress in the idea of evolution which is biologically controlled to creation of variation.
Q6. DNA fingerprinting or genetic finger printing is the process of
Answer : Option C
Explaination / Solution:
VNTR analysis (sometimes called DNA fingerprinting) can be used to identify and match cell samples.
In order to use VNTRs, we must have a source of DNA. The DNA can come from any nucleated cell, e.g., white blood cells, skin samples, semen samples, or hair folicles. Red blood cells cannot be used as they do not have a nucleus.
For a VNTR analysis, the DNA is extracted and cut using restriction endonucleases. A Southern Blot is then performed using various probes.
Q7. Which of the following is formed first out of the following in growing foetus
Answer : Option A
Explaination / Solution:
The heart is formed first in foetus after one month of pregnancy. Limbs and digits after second months, limbs and external genital organs after three months and eye lids and hair after six months.
Q8. Which characteristics of statistics is depends upon purpose of investigation, its nature, size and available resources
Answer : Option A
Explaination / Solution:
No Explaination.
Q9.
When Cl2 gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from
Answer : Option A
Explaination / Solution:
reaction of Cl2 and hot and concentrated sodium hydroxide solution is as below:
6 NaOH + 3Cl2 → 5NaCl + NaClO3 + 3H2O
Here Cl2 disproportionate to -1 and +5
Q10. Homo sapiens arose in Africa and moved across continents and developed into distinct races during
Answer : Option B
Explaination / Solution:
Homo sapiens arose in Africa and moved across continentsand developed into distinct races. During ice age between 75,000-10,000 years ago modern Homo sapiens arose. Pre-historic cave art developed about 18,000 years ago. Agriculture came around 10,000 years back and human settlements started.
