General Science - Biology MCQs
31. Which among the following helps to determine the character of a cell?
[A] Nucleus
[B] Chromosomes
[C] Genes
[D] Plasma
Show Answer
Correct Answer: C [Genes]
Notes:
Genes helps to determine the character of a cell. Gene is the basic physical and functional unit of heredity and are made up of DNA. Some of the genes act as instructions to make molecules called proteins.
32. Genetic Modification (GM) technique RIDL was in news. RIDL is being developed for combating which of the following disease?
[A] Swine Flu
[B] Malaria
[C] Cancer
[D] AIDS
Show Answer
Correct Answer: B [Malaria]
33. Hodophobia is the fear of which of the following?
[A] Sleeping
[B] Travel
[C] Drugs
[D] Cattle
Show Answer
Correct Answer: B [Travel]
Notes:
Hodophobia is the fear of travel. It is also referred to as travel phobia or fear of travel. Acute anxiety which is provoked by travel can be treated with anti-anxiety medication.
34. The Gram Positive Bacteria can be identified by the Gram staining because of the following reasons?
[A] The cell walls have more lipids compared to peptidoglycan
[B] The Cells walls have more Peptidoglycan compared to Lipids
[C] The Cells membrane has more fatty acids
[D] The plasma has Peptidoglycans
Show Answer
Correct Answer: B [The Cells walls have more Peptidoglycan compared to Lipids]
Notes:
The cell wall which is made up of Peptidoglycan as well as lipids gets violet due to the reaction of the CV+. After the decolorization with alcohol, the lipids gets dissolved and the bacteria with higher Peptidoglycan remain violet. These are called Gram Positive bacteria.
35. The most popular Zero Calorie sugar substitutes in the market are made up of Sucralose, as an artificial sweetner. Why sucralose does not have calories?
[A] Because the Sucralose is 600 times more sweet than Sucrose (Natural Sugar) and thus its low quantity gives same taste but zero calories when it is digested in the body.
[B] Because the chemical composition of Sucralose is such that its oxidation gives less calories in body compared to the Sucrose.
[C] Because Sucralose is not a Carbohydrate
[D] Because Sucralose is not digested in the body
Show Answer
Correct Answer: D [Because Sucralose is not digested in the body]
Notes:
The most popular Zero Calorie sugar substitutes in the market are made up of Sucralose, as an artificial sweetner. Sucralose does not have calories because Sucralose is not digested in the body.
36. Beta-Keratin is found in which among the following in abundance?
[A] Fishes
[B] Reptiles
[C] Mammalians
[D] Amphibians
Show Answer
Correct Answer: B [Reptiles]
Notes:
Beta-Keratin is found in reptiles in abundance. β-keratin also known as beta-keratin is a member of a structural protein family and is found in the epidermis of reptiles and birds.
37. “Daps one” immunotherapy is related to which among the following diseases?
[A] AIDS
[B] Tuberculosis
[C] Leprosy
[D] Malaria
Show Answer
Correct Answer: C [Leprosy]
Notes:
“Daps one” immunotherapy is related to leprosy. Leprosy is a chronic, curable infectious disease mainly causing skin lesions and nerve damage and is caused by infection with the bacterium Mycobacterium leprae.
38. Which among the following is not a ‘heriditary’ disease?
[A] Thalessemia
[B] Colour-Blindness
[C] Haemophilia
[D] Leukemia
Show Answer
Correct Answer: D [Leukemia]
Notes:
The human body needs red blood cells and platelets to remain healthy. But in Leukemia increased white blood cells crowd out the red blood cells and platelets. Leukemia is a blood cancer caused by a rise in the number of white blood cells in your body.
39. The bacterium ‘Escherichia coli’ is found mainly in:
[A] Human Intestine
[B] Pteridophytes
[C] Root Nodules of leguminous plants
[D] Paddy fields for nitrogen fixation
Show Answer
Correct Answer: A [Human Intestine]
Notes:
Escherichia coli, also known as E. coli, is a Gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia. It is a type of bacteria that normally lives in your intestines.
40. Consider the following Statements:
- Spleen is also known as the ‘graveyard of RBCs’.
- The lifespan of RBCs is 90 days.
Which of the Statement(s) given above is/are correct?
[A] Only 1
[B] Only 2
[C] Both 1 and 2
[D] Neither 1 nor 2
Show Answer
Correct Answer: A [Only 1]
Notes:
The lifespan of RBCs is 120 days.
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