Cell and Correct Choice
Biology
Q. 1. Biological organisation starts with:
a. Atomic level
b. Submicroscopic molecular level
c. Cellular level
d. Organismic level
Sol. Correct choice: (2)
Q. 2. About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and:
a. calcium and phosphorous
b. phosphorus and sulphur
c. sulphur and magnesium
d. magnesium and sodium
Sol. Correct choice: (1)
Q. 3. Which one of the following is an example of negative feed back loop in humans?
a. Secretion of sweat glands and constriction of skin blood vessels when it is too hot.
b. Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.
c. Secretion of tears after falling of sand particles in to the eye
d. Salivation of mouth at the sight of delicious food.
Sol. When the set point of hypothalamus is disturbed by high temperature, it stimulates vasodilation and sweating while in low temperature there is vasoconstriction and shivering. Correct choice: (2)
Q. 4. What is common to whale, seal and shark?
a. Homoiothermy
b. Seasonal migration]
c. Thick subcutaneous fat
d. Convergent evolution
Sol. Shark is poikilothermous. All three species show adaptations for aquatic life while these are not closely related. Correct choice: (4)
Q. 5. Which one of the following is not a constituent of cell membrane?
a. Phospholipids
b. Cholesterol
c. Glycolipids
d. Proline
Sol. Correct choice: (4)
Q. 6. Select the wrong statement from the following:
a. The chloroplasts are generally much larger than mitochondria.
b. Both chloroplasts and mitochondria contain and inner and an outer membrane
c. Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane
d. Both chloroplasts and mitochondria contain DNA.
Sol. Correct choice: (3)
Q. 7. The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:
a.
Q. 1. Biological organisation starts with:
a. Atomic level
b. Submicroscopic molecular level
c. Cellular level
d. Organismic level
Sol. Correct choice: (2)
Q. 2. About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and:
a. calcium and phosphorous
b. phosphorus and sulphur
c. sulphur and magnesium
d. magnesium and sodium
Sol. Correct choice: (1)
Q. 3. Which one of the following is an example of negative feed back loop in humans?
a. Secretion of sweat glands and constriction of skin blood vessels when it is too hot.
b. Constriction of skin blood vessels and contraction of skeletal muscles when it is too cold.
c. Secretion of tears after falling of sand particles in to the eye
d. Salivation of mouth at the sight of delicious food.
Sol. When the set point of hypothalamus is disturbed by high temperature, it stimulates vasodilation and sweating while in low temperature there is vasoconstriction and shivering. Correct choice: (2)
Q. 4. What is common to whale, seal and shark?
a. Homoiothermy
b. Seasonal migration]
c. Thick subcutaneous fat
d. Convergent evolution
Sol. Shark is poikilothermous. All three species show adaptations for aquatic life while these are not closely related. Correct choice: (4)
Q. 5. Which one of the following is not a constituent of cell membrane?
a. Phospholipids
b. Cholesterol
c. Glycolipids
d. Proline
Sol. Correct choice: (4)
Q. 6. Select the wrong statement from the following:
a. The chloroplasts are generally much larger than mitochondria.
b. Both chloroplasts and mitochondria contain and inner and an outer membrane
c. Both chloroplasts and mitochondria have an internal compartment, the thylakoid space bounded by the thylakoid membrane
d. Both chloroplasts and mitochondria contain DNA.
Sol. Correct choice: (3)
Q. 7. The overall goal of glycolysis, Krebs cycle and the electron transport system is the formation of:
a.