1. Which among the following is / are correct regarding a mature sperm and ovum?
[A] They both are of approximately same size
[B] They both have equal number of Chromosomes
[C] They both contain flagella
[D] None of the above
Show Answer
Correct Answer: B [They both have equal number of Chromosomes]
Notes:
The number of chromosomes is reduced from 46 (23 pairs) to 23 during the process of meiosis. In a human egg or sperm, there are 23 chromosomes, one of which is an X or Y. A human egg is haploid (has 23 chromosomes) and a sperm is haploid (has 23 chromosomes).
2. The monocarpic plants produce flowers only ________?
[A] Once in a year
[B] Once in a season
[C] Once in lifetime
[D] One flower per plant
Show Answer
Correct Answer: C [Once in lifetime]
Notes:
The monocarpic plants produce flowers only once in lifetime. Monocarpic plants are those that flower, set seeds and then die.
3. The Indian Pipe Plant or Monotrapa can be best placed in which among the following groups?
[A] Parasite
[B] Saprophyte
[C] Insectivorous
[D] Lithophyte
Show Answer
Correct Answer: B [Saprophyte]
Notes:
Pipe Plant is a total saprophyte i.e. thrives on dead or decayed organic matter
4. Triticale is a hybrid of which two crops?
[A] Wheat and Rice
[B] Wheat and Rye
[C] Rice and Rye
[D] Rice and Sorghum
Show Answer
Correct Answer: B [Wheat and Rye]
Notes:
Triticale is the world’s first man-made cereal developed by crossing wheat (Triticum) and rye (Secale) to combine wheat’s yield and grain quality with rye’s disease resistance and environmental tolerance. The name “triticale” merges “Triticum” and “Secale”, its parent genera.
5. What is an another name for blood cancer?
[A] Leukemia
[B] Carcinoma
[C] Sarcoma
[D] Melanoma
Show Answer
Correct Answer: A [Leukemia]
Notes:
Leukemia, a type of cancer found in your blood and bone marrow. It is caused by the rapid production of abnormal white blood cells. The high number of abnormal white blood cells are not able to fight infection, and they impair the ability of the bone marrow to produce red blood cells and platelets.
6. Who proposed five kingdom classification?
[A] Ernst Mayr
[B] M.W.Beijerinck
[C] R.H. Whittaker
[D] D.I Ivanovsky
Show Answer
Correct Answer: C [R.H. Whittaker]
Notes:
The five kingdom classification was proposed by R.H. Whittaker in 1969. The five kingdoms were formed on the basis of characteristics. It includes Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae, and Kingdom Animalia.
7. Which of the following Vitamin is responsible for anti-sterile activities?
[A] Vitamin A
[B] Vitamin B
[C] Vitamin E
[D] Vitamin D
Show Answer
Correct Answer: C [Vitamin E]
Notes:Vitamin E is known as anti-sterility vitamin or fertility vitamin. It is chemically called as tocopherol. Vitamin E deficiency occurs rarely in adults. Much like vitamin C, vitamin E is another powerful anti-oxidant. Vitamin E is used during testosterone synthesis. Sperm production or spermatogenesis requires vitamin E as well as zinc. Following symptoms have been associated with vitamin E deficiency in humans:
- Muscular weakness & dystrophy, nocturnal muscle cramps
- Neurological disorders
- Degeneration of liver (hepatic necrosis)
- Shortened life-span of RBCs
8. Where does pearls are formed?
[A] Inside squids
[B] Inside snails
[C] Inside oysters
[D] Inside mollusks
Show Answer
Correct Answer: C [Inside oysters]
Notes:
Natural Pearls are formed when an irritant usually a parasite works its way into an oyster, mussel, or clam. As a defense mechanism, a fluid is used to coat the irritant. Layer upon layer of this coating, called nacre, is deposited until a lustrous pearl is formed.
9. Which of the following is not immunized by the Triple Antigen?
[A] Diphtheria
[B] Tetanus
[C] Typhoid
[D] Whooping cough
Show Answer
Correct Answer: C [Typhoid]
Notes:
Triple antigen is a combined vaccine against diphtheria, tetanus, and pertussis (whooping cough), in which the pertussis component is acellular. This is in contrast to whole-cell, inactivated DTP. The acellular vaccine uses selected antigens of the pertussis pathogen to induce immunity.
10. Which one of the following approaches comes under the category of biotechnology?
[A] Use of living organisms or substances obtained from them in industrial processes
[B] Modernizing the commercial industries to produce products for use in biological research
[C] Use of modern technology to investigate biological disorders
[D] Use of industrial technology to increase the biosphere
Show Answer
Correct Answer: A [Use of living organisms or substances obtained from them in industrial processes]
Notes:
The biotechnology industry uses bacterial cells for the production of biological substances that are useful to human existence, including fuels, foods, medicines, hormones, enzymes, proteins, and nucleic acids. Another area of biotechnology involves improvement of the qualities of plants through genetic engineering.
