11. Which of the following is the largest group of the plant kingdom?
[A] Thallophyta
[B] Bryophyta
[C] Pteridophyta
[D] Euglena
Show Answer
Correct Answer: A [Thallophyta]
Notes:
The plant kingdom consists of 390,000 species known till date. The plant kingdom is divided into five major groups: Thallophyta, Bryophyta, Pteridophyta, Gymnosperms and Angiosperms.
12. What is an enzyme?
[A] Acid
[B] Base
[C] Salt
[D] Catalyst
Show Answer
Correct Answer: D [Catalyst]
Notes:
Enzyme is a protein. It acts as a catalyst in living organisms, and controls the rate of chemical reactions inside the body.
13. What is Rancidity?
[A] Deterioration of Fat
[B] Deterioration of Glucose
[C] Deterioration of Protein
[D] Deterioration of Vitamins
Show Answer
Correct Answer: A [Deterioration of Fat]
Notes:
The process of oxidation of oily and Fatty food, which changes its taste and smell is known as Rancidity. Rancidity generally occurs in Fat.
14. The protein from which the hooks and filaments of the flagella are made is called?
[A] keratin
[B] flagellin
[C] gelatin
[D] casein
Show Answer
Correct Answer: B [flagellin]
Notes:
The flagellar filament is composed of a single protein called flagellin.
15. The stamen is surrounded by__ and __.
[A] anther, filament
[B] Sepals, filament
[C] petals, sepals
[D] Pistil, anther
Show Answer
Correct Answer: A [anther, filament]
Notes:
The stamen is surrounded by anther and filament. The anther contains four sac-like structures that produce pollen for pollination. The filament forms the thread-like stalk that supports the anther of the plant.
16. Oxidative phosphorylation usually refers to__?
[A] Anaerobic production of ATP
[B] Citric acid cycle production of ATP
[C] Alcoholic fermentation
[D] None of the above
Show Answer
Correct Answer: B [Citric acid cycle production of ATP]
Notes:
The NADH generated in the citric acid cycle can later be oxidized to drive ATP synthesis in a type of process called oxidative phosphorylation.
17. How are the nutrients absorbed by the plants?
[A] roots
[B] leaves
[C] flower
[D] buds
Show Answer
Correct Answer: A [roots]
Notes:
Plants absorb nutrients through their roots. They transport their nutrients and water through the stem to the parts that are above ground level.
18. Which of the following is not a method by which pathogens affect the yield of crops?
[A] Reduce the quantity of yield
[B] Reduce the quality of crop produce
[C] Increase in cost production
[D] Increase the flowering period
Show Answer
Correct Answer: D [Increase the flowering period]
Notes:
Pathogens reduce the number of products and also affect the yield of the crop by reducing the quality of crop production. The cost of production of pathogens also increases due to low yield and expenditure on pesticides.
19. In which there are two forms of polyp or medusa?
[A] Cnidaria
[B] Platyhelminthes
[C] Aschelminthes
[D] Ctenophora
Show Answer
Correct Answer: A [Cnidaria]
Notes:
In Cnidaria, there are two forms of polyp (sessile and cylindrical) or medusa.
20. Consider the following:
- Turtles
- Alligators
- Crocodiles
- Frog
Which of the above are reptiles?
[A] Only 1 and 2
[B] Only 2 and 3
[C] Only 1, 2 and 3
[D] Only 2, 3 and 4
Show Answer
Correct Answer: C [Only 1, 2 and 3]
Notes:
The reptile family includes lizards, turtles, alligators, crocodiles, and snakes. Reptiles have rough scales or bony plates covering the skin. It is shed regularly. They are cold-blooded creatures.
