Dear Friends,
Please find the solutions of the Wednesday Geography & Environment Quiz #1. In case you have not solved the quiz, please visit the link below before reading the solution
Solutions to The Friday General Science & Awareness Quiz #1
Q.1) Consider the following statements:
1. ELISA test is employed as the first and most basic test for an individual to detect cancer.
2. Almost 50% of human beings have RH (+ve) blood while the remaining have Rh(-ve) blood.
Select the correct statement using the codes given below.
a) 1 only
b) 2 only
c) Both 1 and 2
d) None of the above
Ans-d
Explanation– Elisa means Enzyme-linked immunosorbent assay. It is very very sensitive test to detect antigen or antibodies in the blood/serum. We use enzyme –substrate reaction and the color change due to it as a process to identify antigen or antibody in it. It is very powerful method and can give presence of protein present even in picograms.
Antigens are infectious agents and their materials inside body. This causes body to produce antibodies to fight against them. If we can detect type of antibody in blood or serum we may detect what kind of antigen is there. Elisa comes thus here as very handy in it.
Elisa is not the basic test of cancer. It is basic test of HIV. So statement 1 is wrong.
You can read about cancer detection tests here.
Q.2) Consider the following vegetables. Which of the following are the roots used as vegetables?
1. Potato
2. Radish
3. Turnip
4. Yam
Select the correct answer using the codes given below.
a) 1, 2 and 3 only
b) 2, 3 and 4 only
c) 2 and 4 only
d) 1 and 3 only
Ans- b
Explanation-Potato is a stem tuber. Tubers are parts of plants which stores food. Thus Statement 1 is wrong.
Turnip is a root. You can read more here.
Radish is a root. You can read more here.
Yam is also a root tuber.
Hence option b
Q.3) In which of the following sets of blood groups, blood transfusion is possible?
a) A and O (A donor)
b) B and A (B donor)
c) A and AB (A donor)
d) AB and O (AB donor)
Ans- c
Explanation– Blood group O is universal donor and AB is a universal recipient. Being a universal donor, Blood group O can donate blood to all other groups and being a universal recipient blood group AB can accept blood from all other groups.
Thus in all the options, c is the one in which transfusion is possible as AB will receive and A will donate
Q.4) Consider the following plants:
1. Jasmine
2. Sugarcane
3. Turmeric
Which of the above is/are propagated by vegetative method?
a) 1 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2 and 3
Ans-d
Explanation–Vegetative propagation or vegetative reproduction is the process of multiplication in which a portion of plant body functions as propagates and develops into a new individual without any sexual union or fertilization. All three options can be grown like this.See here
Q.5) Consider the following statements:
1. Dengue is a protozoan disease transmitted by mosquitoes.
2. Retro-orbital pain is not a symptom of Dengue.
3. Drastic Decline in number of blood platelets is found in patients suffering from dengue.
Select the correct statement using the codes given below:
a) 1 and 2 only
b) 3 only
c) 2 and 3 only
d) 1 and 3 only
Ans- b
Explanation-Dengue is caused by dengue virus. It is malaria which is caused by protozoa. Thus, statement 1 is wrong.
Retro orbital pain or pain behind the eyes is one of the symptom of Dengue. See here. Statement 2 is wrong.
Dengue is disease in which platlets get greatly reduced. Thus statement 3 is correct.
Q.6) In the case of a ‘test-tube baby’?
a) fertilization takes place inside the test tube
b) development of the baby takes place inside the test tube
c) fertilization takes place outside the mother’s body
d) unfertilized egg develops inside the test tube
Ans– c
Explanation– A test tube baby is the term that refers to a child that is conceived outside the woman’s body. The process is also referred to as “in vitro” (outside the body) fertilization
Q.7) Which one of the following is the most important characteristic of water to act as a good solvent?
a) Purity of water
b) Ionizing power of water
c) Polar nature of water
d) Dissolving power of water
Ans- c
Explanation- This is because of polar nature of water molecule. Water molecule has uneven distribution of electron density. Water has a partial negative charge near the oxygen atom due the unshared pairs of electrons, and partial positive charge on hydrogen atoms. This makes it polar and it is able to act as a good solvent
Q.8) Which of the following statements regarding carbon dioxide is/are correct?
1. It is prepared on large scale by the action of water on lime.
2. In the solid form it can be used as a refrigerant.
Select the correct answer using the codes given below.
a) 1 only
b) 2 only
c) Both 1 and 2
d) None of the above
Ans– b
Explanation– Carbon dioxide is prepared on the large scale by heating of calcium carbonate at 850 degree celcius. Action of water on lime produces calcium hydroxide. Statement 1 is wrong.
Carbon dioxide is used as a refrigent under name dry ice
Q.9) Sulphuric acid is used in the manufacture of:
1. Fertilizers
2. Dyestuff intermediates
3. Pigments and paints
4. Storage batteries
Select the correct answer using the codes given below:
a) 1 and 2 only
b) 2 and 3 only
c) 1, 3 and 4 only
d) 1, 2, 3 and 4
Ans-d
Explanation– Sulphuric acid is known as king of all chemicals because of wide applications of it. All options find use of it.See this. Sulphuric acid is used as an important ingredient in textile dyes and in leather industry dyes
Q.10) Which of the following statements is/are true regarding a light wave travelling from air to glass?
1. Its frequency remained unchanged.
2. Its speed changes.
Select the correct answer using the codes given below.
a) 1 only
b) 2 only
c) Both 1 and 2
d) None of the above
Ans–c
Explanation– This is process of refraction being talked about. In refraction speedand wavelength of light changes as shown here. Frequency remains unchanged. This is because the electric and magnetic fields have to remain continuous at the refractive index boundary.
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