General Science - Biology MCQs
1. Daltonism is the name referred to which of the following disorders as this name was kept in honour of John Dalton , the father of atomic theory?
[A] Deafness
[B] Color Blindness
[C] Night Blindness
[D] Astigmatism
Show Answer
Correct Answer: B [Color Blindness]
Notes:
Daltonism refers to the Colorblindness of the red-green type which is also known as deuteranopia or deuteranomaly.The term “Daltonism” is derived from the name of the chemist and physicist, John Dalton (1766-1844).
2. Which part of the Central Nervous System controls “reflex Actions” ?
[A] Mesencephalon
[B] Rhombencephalon
[C] Medulla oblongata
[D] Spinal Chord
Show Answer
Correct Answer: D [Spinal Chord]
Notes:
The nervous system is made of two parts viz. Central Nervous System (CNS) and the Peripheral Nervous System (PNS). CNS is made of Brain [cerebrum, brainstem and cerebellum] and spinal cord. The PNS is made of nerves and neural ganglia. Further, the meninges (three membranes that envelop the brain and spinal cord) are also a part of the nervous system
3. The most common use of ‘silicone hydrogels’ is making of which among the following?
[A] Surgery Equipments
[B] Contact Lenses
[C] Breast Transplants
[D] Capsules of medicines
Show Answer
Correct Answer: B [Contact Lenses]
Notes:
Silicone hydrogel and regular hydrogel lenses both are made of plastics that are hard when dry but readily absorb water and become soft and gel-like when hydrated. They are most commonly used in making Contact Lenses.
4. A chloroplast without cell wall is ________ ?
[A] aleuroplast
[B] amyloplast
[C] protoplast
[D] photoplast
Show Answer
Correct Answer: C [protoplast]
Notes:
A chloroplast without cell wall is protoplast. Chloroplasts are organelles that perform photosynthesis. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in plant and algal cells.
5. Cobalt is a component of which of the following Vitamins?
[A] Vitamin A
[B] Vitamin D
[C] Vitamin E
[D] Vitamin B12
Show Answer
Correct Answer: D [Vitamin B12]
Notes:
Cobalt is a component of Vitamin B12. Vitamin B12 is also known as also known as cobalamin, is an important water-soluble vitamin which is used in the production of red blood cells and DNA.
6. Apart from the temporal bone, which among the following is considered as strongest bone in human body?
[A] Humerus
[B] Fibula
[C] Femur
[D] Tibia
Show Answer
Correct Answer: C [Femur]
Notes:
Apart from the temporal bone, femur is considered as strongest bone in human body. It is the only bone located within the human thigh. It is both the longest and the strongest bone in the human body. It extends from the hip to the knee.
7. Which of the following part of the body stores Vitamin A, Vitamin D as well as Vitamin B12?
[A] Brain
[B] Liver
[C] Pancreas
[D] Red Blood Cells
Show Answer
Correct Answer: B [Liver]
Notes:
Liver stores Vitamin A, Vitamin D as well as Vitamin B12. The bile juice secreted during digestion is essential for absorbing them so that the body can use them.
8. In which of the following insects, a pigment called luciferin is found?
[A] Housefly
[B] Firefly
[C] Sandfly
[D] Fruitfly
Show Answer
Correct Answer: B [Firefly]
Notes:
A pigment called luciferin is found in firefly. Luciferin is a light-emitting compound which is found in organisms that generate bioluminescence. Luciferins typically undergo an enzyme-catalyzed reaction with molecular oxygen.
9. Leslie Orgel was known for discovering which of the following?
[A] life was based on RNA
[B] life was based on protien
[C] life was based on DNA
[D] None of these
Show Answer
Correct Answer: A [life was based on RNA]
Notes:
In the late 1960s, Orgel proposed that life was based on RNA before being based on DNA or proteins. His theory included genes based on RNA and RNA enzymes.
10. Which of the following organelles is absent in animal cells and present in plant cells?
[A] Cytoplasm
[B] Cell wall
[C] Vacuoles
[D] Mitochondria
Show Answer
Correct Answer: B [Cell wall]
Notes:
The cell wall surrounds the plasma membrane of plant cells. The cell wall is a fairly rigid layer that surrounds a cell located outside the plasma membrane.
