11. Which is the largest phylum of Animalia?
[A] Arthropoda
[B] Annelida
[C] Moluska
[D] Aves
Show Answer
Correct Answer: A [Arthropoda]
Notes:
Arthropoda is the largest phylum of animals. In Arthropoda we study in detail about insects.
12. Which of the following causes chloroplasts to be green?
[A] because they contain the pigment cobalt
[B] because they contain the pigment chlorophyll
[C] because they contain the pigment carotenoids
[D] because they contain the pigment betacyanins
Show Answer
Correct Answer: B [because they contain the pigment chlorophyll]
Notes:
Chloroplasts are green because they contain the pigment chlorophyll, which is important for photosynthesis. Chlorophyll occurs in many different forms. Chlorophyll a and b are the major pigments of higher plants and green algae.
13. Who among the following discovered the plasma membrane?
[A] Robert Hooke
[B] Albert von Kolliker
[C] George E. Palade
[D] Rudolf von Kölliker
Show Answer
Correct Answer: A [Robert Hooke]
Notes:
The plasma membrane is mainly composed of fatty-acid-based lipids and proteins. Robert Hooke discovered the plasma membrane.
14. How many amino acids are needed to make proteins?
[A] 19
[B] 20
[C] 21
[D] 22
Show Answer
Correct Answer: B [20]
Notes:
Amino acids combine to form protein. It requires 20 amino acids to make a protein in both plants and animals. Amino acids and protein are considered as the main body building blocks.
15. Who among the following is considered as the “Father of Indian Phycology”
[A] Prof. M.O.P. Iyenger
[B] Prof. J.N. Mishra
[C] Prof. R.R. Mishra
[D] Prof. R.N. Singh
Show Answer
Correct Answer: A [Prof. M.O.P. Iyenger]
Notes:
MOP Iyengar from Madras is considered the father of Indian Phycology. He discovered Fritschiella heterotrichus terrestrial algae.
16. 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.
17. Anaerobic respiration is found in which of the following?
[A] mitochondria
[B] cytoplasm
[C] Both 1 and 2
[D] cell wall
Show Answer
Correct Answer: B [cytoplasm]
Notes:
Anaerobic respiration can be found only in the cytoplasm while Aerobic Respiration can be found in the cytoplasm and the mitochondria.
18. What is the function of strigolactone?
[A] promote seed germination in some species
[B] inhibit lateral apical development in the absence of auxins
[C] establishment of mycorrhizae
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Strigolactones promote seed germination in some species and inhibit lateral apical development in the absence of auxin. Strigolactones also play a role in the establishment of mycorrhiza as well as a mutualistic association between plant roots and fungi.
19. Which of the following shows double fertilization?
[A] Gymnosperms
[B] Angiosperms
[C] Algae
[D] All of the above
Show Answer
Correct Answer: B [Angiosperms]
Notes:
Angiosperms show double fertilization. Angiosperms are plants that produce flowers and bear their seeds in fruits.
20. What causes the characteristic stem-pitting symptoms in the disease?
[A] Citrus exocortis
[B] Citrus tristeza
[C] Citrus greening
[D] Citrus canker
Show Answer
Correct Answer: B [Citrus tristeza]
Notes:
Stem-pitting is caused by a strain of the Citrus Tristeza virus. This results in delayed bud break, poor growth in spring, stunted growth of infected plants, and a drop in yield.
