1. Which antigen is present in O blood group?
[A] Either A or B
[B] Both A and B
[C] Neither A nor B
[D] O
Show Answer
Correct Answer: C [Neither A nor B]
Notes:
There are no antigens present in Blood group O. It has both anti-A and anti-B antibodies in the plasma and also some special “anti-A,B” antibodies. Blood group AB has both A and B antigens, but no antibodies.
2. Theory of natural selection was proposed by ?
[A] Mendel
[B] Darwin
[C] Lamarck
[D] Karl Landsteiner
Show Answer
Correct Answer: B [Darwin]
Notes:
Theory of natural selection was proposed by Darwin.The theory is an explanation for adaptation and speciation. He defined natural selection as the “principle by which each slight variation [of a trait], if useful, is preserved”.
3. Which among the following makes the Cornea Transplantation easy and used more widely ?
[A] Cornea are easily available
[B] Cornea does not link up with blood vessels
[C] both of the above reasons
[D] none of the above
Show Answer
Correct Answer: B [Cornea does not link up with blood vessels]
Notes:
A cornea transplant also called as keratoplasty is a surgical procedure to replace part of your cornea with corneal tissue from a donor. Cornea does not link up with blood vessels, this makes the Cornea Transplantation easy and used more widely.
4. Who among the following were awarded Nobel Prize in 1958 for One Gene One Enzyme Concept?
[A] Landsteiner & Weiner
[B] Avery, Mccleod and mc Carthy
[C] Jacob & Wollman
[D] George Beadle and Edward Tatum
Show Answer
Correct Answer: D [George Beadle and Edward Tatum]
Notes:
George W. Beadle (1903-1989) and Edward L. Tatum (1909-1975) show how genes direct the synthesis of enzymes that control metabolic processes. George Beadle and Edward Tatum were awarded Nobel Prize in 1958 for One Gene One Enzyme Concept.
5. Which of the following plants have respiratory roots?
[A] Marshy Plants
[B] Mangroves
[C] Epiphytes
[D] Submerged Hydrophytes
Show Answer
Correct Answer: B [Mangroves]
Notes:
Respiratory roots are found in aquatic plants and plants which grow on marshy areas. In mangroves the roots are not getting sufficient oxygen and hence they grow upwards from the ground.
6. Which among the following disease has the minimum incubation period, comparing to other ones?
[A] Small Pox
[B] Influenza
[C] Measles
[D] Mumps
Show Answer
Correct Answer: B [Influenza]
Notes:
Influenza (1-2 days) , rest are 6-15 days
7. The useful part of Zingiber officinale is ____?
[A] Roots
[B] Rhizome
[C] Leaves
[D] fruits
Show Answer
Correct Answer: B [Rhizome]
Notes:
The useful part of Zingiber officinale is rhizome. It is a flowering plant whose rhizome, ginger root or ginger, is widely used as a spice and also as a medicine. It is a herbaceous perennial plant.
8. Which of the following cells are closely associated and interacting with guard cells?
[A] Transfusion tissue
[B] Complementary cells
[C] Subsidiary cells
[D] Hypodermal cells
Show Answer
Correct Answer: C [Subsidiary cells]
Notes:
Subsidiary cells are the accessory cells to guard cells in the epidermis of plants. Two or four subsidiary cells are found surrounding the pair of guard cells. Subsidiary cells do not consist of chloroplasts. They provide support for the functioning of guard cells in the epidermis.
9. What is the name of a group of similar cells performing a specific function?
[A] Tissue
[B] Organ
[C] Organ system
[D] Cellular organization
Show Answer
Correct Answer: A [Tissue]
Notes:
A tissue is an ensemble of similar cells and their extracellular matrix from the same origin that together carry out a specific function. Organs are then formed by the functional grouping together of multiple tissues.
10. Which of the following is responsible for giving colour to human skin?
[A] Haemoglobin
[B] Melanin
[C] Luciferin
[D] Flavonoids
Show Answer
Correct Answer: B [Melanin]
Notes:
Melanin is a pigment that gives human skin, hair, and eyes their color. Dark-skinned people have more melanin in their skin than light-skinned people have. Melanin is produced by cells called melanocytes.
