1. Amino acids join together to make polypeptides. What polypeptides make by joining together?
[A] Carbohydrates
[B] proteins
[C] vitamins
[D] All the above
Show Answer
Correct Answer: B [proteins]
Notes:
Proteins are made up of chains of amino acids bound by bonds called peptide bond. There are some 22 different known amino acids which can compose proteins. There may be many more unknown to us.
2. The cultivation of which of the plants on wastelands has a potential to generate biofuel in large quantities?
[A] Jatropha curcas
[B] Copaifera langsdorffii
[C] Camelina sativa
[D] None of the above
Show Answer
Correct Answer: A [Jatropha curcas]
Notes:
The cultivation of Jatropha curcas on wastelands has a potential to generate biofuel in large quantities. It is a species of flowering plant in the spurge family called Euphorbiaceae, that is native to the American tropics, most likely in Mexico and Central America.
3. Lipoproteins which are the large molecules and which transport the cholesterol in the bloodstream are ______-?
[A] protein molecules
[B] fat molecules
[C] protein and fat molecules
[D] Lipids
Show Answer
Correct Answer: C [protein and fat molecules]
Notes:
A lipoprotein is a biochemical assembly consisting of protein and fat molecules whose primary purpose is to transport hydrophobic lipid molecules in water, as in blood plasma or other extracellular fluids.
4. Deposition of which among the following in the joints, causing inflammation is reason of Gout, one of the forms of arthritis?
[A] Lactic Acid
[B] Oxalic Acid
[C] Acetic Acid
[D] Uric Acid
Show Answer
Correct Answer: D [Uric Acid]
Notes:
Gout is caused by deposition of uric acid crystals in the joint, causing inflammation. There is also an uncommon form of gouty arthritis caused by the formation of rhomboid crystals of calcium pyrophosphate known as pseudogout. In the early stages, the gouty arthritis usually occur in one joint, but with time, it can occur in many joints and be quite crippling. The joints in gout can often become swollen and lose function.
5. Which blood group among the following is known as universal donor? (UPSC Prelims 1982)
[A] A
[B] B
[C] O
[D] AB
Show Answer
Correct Answer: C [O]
Notes:
Type O negative blood group is considered as the universal blood type. People with type O blood group are called universal donors because type O negative blood is compatible to any blood recipient’s type.
6. Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains which of the following minerals? (UPSC Prelims 1998)
[A] Polyunsaturated fatty acids
[B] saturated fatty acids
[C] essential vitamins
[D] more carbohydrates and proteins
Show Answer
Correct Answer: A [Polyunsaturated fatty acids]
Notes:
Consumption of fish is considered to be healthy when compared to flesh of other animals because fish contains polyunsaturated fatty acids. Polyunsaturated fatty acid is an anti oxidant, which helps in building of tissues.
7. Consider the following statements:
- Tapeworm is a hermaphrodite.
- Round-worm has separate sexes.
- Filaria is caused by a nematode.
- Guinea-worm is an annelid.
Which of these are correct? (UPSC Prelims 2001)
[A] Only 1 and 2
[B] 1, 2 and 3
[C] 3 and 4
[D] 2, 3 and 4
Show Answer
Correct Answer: B [1, 2 and 3]
Notes:
Filariasis is a parasitic disease caused by an infection with roundworms of the Filarioidea type. These are spread by blood-feeding diptera such as black flies and mosquitoes. Lymphatic filariasis is caused by the worms Wuchereria bancrofti, Brugia malayi, and Brugia timori. Unlike this, a tapeworm is a hermaphrodite, which means that it has both male and female reproductive organs, and Round-worm has separate sexes.
8. Consider the following statements:
I. Meningococcal Meningitis is transmitted from person to person by mosquito bites.
II. Vomitting and neck pain are two of the symptoms of Meningococcal Meningitis.
Which of the statements given above is/are correct? (UPSC Prelims 2006)
[A] I only
[B] II only
[C] Both I and II
[D] Neither I nor II
Show Answer
Correct Answer: B [II only]
Notes:
This virus is spread by mosquito bites and has become an important cause of viral meningitis in most of the United States.
Bacterial meningitis symptoms may develop within hoursor days. Fever, severe headache, and neck stiffness are the hallmark symptoms of meningitis. Others include: Nausea and vomiting.
9. Deficiency in which among the following leads to beriberi disease?
[A] Vitamin B1
[B] Vitamin B2
[C] Vitamin B3
[D] Vitamin B6
Show Answer
Correct Answer: A [Vitamin B1]
Notes:
Vitamin B1/Thiamine deficiency leads to a disease called beriberi. Over polishing of rice also leads to beriberi.
10. Francis Galton is related to which of the following science?
[A] Eugenics
[B] Microbiology
[C] Bryology
[D] Ecology
Show Answer
Correct Answer: A [Eugenics]
Notes:
Francis Galton is related to Eugenics. Galton defined eugenics as “the study of all agencies under human control which can improve or impair the racial quality of future generations”.
