11. What is study of fungus Known as?
[A] Mycology
[B] Phrenology
[C] Physiology
[D] Biology
Show Answer
Correct Answer: A [Mycology]
Notes:
Mycology is the branch of biology concerned with the study of fungi, including their genetic and biochemical properties, their taxonomy and their use to humans as a source for tinder, medicine, food, and entheogens, as well as their dangers, such as toxicity or infection.
12. Which of the following is the main constituent of the Gobar gas?
[A] Carbon dioxide
[B] Methane
[C] Ethylene
[D] Carbon monoxide
Show Answer
Correct Answer: B [Methane]
Notes:
Biogas or Gobar gas is produced by the breakdown of organic matter in the absence of oxygen. It can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. It is a renewable energy source. It comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes. It is produced by anaerobic digestion.
13. Deficiency in which among the following leads to goitre?
[A] Iodine
[B] Calcium
[C] Phosporous
[D] Zinc
Show Answer
Correct Answer: A [Iodine]
Notes:
Goitre is a disorder caused due to the deficiency of iodine. Malfunction of thyroid gland leads to goitre (Swelling of neck). It is due to the bulge of the thyroid gland.
14. Who gave the theory of Five King of Classification?
[A] RH Whittaker
[B] Ernest Haeckel
[C] Copeland
[D] Carolus Linnaeus
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Correct Answer: A [RH Whittaker]
Notes:
The theory of Five Kingdom of classification (Monera, Protista, Fungi, Plantae and Animalia) is given by R. H. Whittaker in 1969.
15. What is another name for cyanobacteria?
[A] Blue-green algae
[B] Protists
[C] Golden algae
[D] Slime moulds
Show Answer
Correct Answer: A [Blue-green algae]
Notes:
Cyanobacteria, also called blue-green algae, are microscopic organisms found naturally in all types of water.
16. Why don’t diatoms perish quickly?
[A] Because they are Chitinous
[B] because it has siliceous walls
[C] because Diatoms contain saline soil
[D] because their body is impervious to water
Show Answer
Correct Answer: B [because it has siliceous walls]
Notes:
Diatoms are unique among microorganisms in that they have rigid cell walls made of silica, called frustules. These frustules are intricately patterned and provide protection to the diatom cell. The silica frustules are durable and resist decomposition, which helps diatoms to maintain their structural integrity and avoid rapid decay.
17. Which of the following minerals is related to cytochromes?
[A] Cu and Fe
[B] Cu
[C] Mg
[D] Fe
Show Answer
Correct Answer: A [Cu and Fe]
Notes:
The minerals associated with cytochromes are Fe and Cu.
18. What is another name for Koshland’s theory of enzyme action?
[A] Reduced fit theory
[B] Induced fit theory
[C] Enzyme coenzyme theory
[D] Lock and key theory
Show Answer
Correct Answer: B [Induced fit theory]
Notes:
Induced fit theory is also known as Koshland’s theory of enzyme action. It describes the enzyme-substrate interaction.
19. Which bacteria supply ammonia to soil?
[A] Rhizobium
[B] Lactobacillus
[C] Streptomyces
[D] Campylobacter
Show Answer
Correct Answer: A [Rhizobium]
Notes:
Rhizobium is an organic fertilizer. Biofertilizers are substances that contain microorganisms that, when applied to the soil, increase the amount of nutrients. It also enhances the growth of plants.
20. Bignonia unguiscati is an example of which of the following?
[A] Leaflet Hooks
[B] Leaf Roots
[C] Scale Leaves
[D] Leaf Spines
Show Answer
Correct Answer: A [Leaflet Hooks]
Notes:
Leaflet Hooks is the terminal leaflets of the leaf become modified into hook-like structures that help them to climb. Bignonia unguiscati is an example of this.
