11. Which of the following branch of biology deals with the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants?
[A] Agriforestry
[B] Horticulture
[C] Arboriculture
[D] Forestry
Show Answer
Correct Answer: C [Arboriculture]
Notes:
Arboriculture is the cultivation, management, and study of individual trees, shrubs, vines, and other perennial woody plants.
12. Which of the following class of leucoplasts is responsible for fat storage?
[A] Amyloplast
[B] Proteinoplasts
[C] Aleuroplasts
[D] Elaioplasts
Show Answer
Correct Answer: D [Elaioplasts]
Notes:
Leucoplast is colorless or non-pigmented in nature. It is used for storage. Amyloplasts store starch, proteinoplasts and aleuroplasts as well as modify proteins.
13. Who among the following discovered the ribosome?
[A] George E. Palade
[B] Theodor Boveri
[C] Albert von Kolliker
[D] Robert Brown
Show Answer
Correct Answer: A [George E. Palade]
Notes:
Ribosomes were discovered by George E. Palade. He described them as small particles in the cytoplasm that were preferentially attached to the endoplasmic reticulum membrane.
14. What are the inclusion bodies of the measles virus?
[A] intracytoplasmic
[B] intranuclear
[C] both (a) and (b)
[D] none of these
Show Answer
Correct Answer: C [both (a) and (b)]
Notes:
The inclusion bodies of the measles virus are intracytoplasmic and intranuclear.
15. Where is teichoic acid commonly found?
[A] cell walls of gram positive bacteria
[B] outer membranes of gram positive bacteria
[C] cell walls of gram negative bacteria
[D] outer membranes of gram negative bacteria
Show Answer
Correct Answer: A [cell walls of gram positive bacteria]
Notes:
Teichoic acid is found within the cell wall of most Gram-positive bacteria. It appears to extend to the surface of the peptidoglycan layer, and species in the genera Staphylococcus, Streptococcus, Bacillus, Clostridium, Corynebacterium and Listeria.
16. Apical, lateral and intercalary are the types of which plant tissue?
[A] Protective tissues
[B] Permanent tissues
[C] Meristematic tissue
[D] None of these
Show Answer
Correct Answer: C [Meristematic tissue]
Notes:
Apical, lateral and intercalary are the types of Meristematic tissue. Apical meristem upsurges the length of the plant, Lateral meristem upsurges the thickness of the plant, and Intercalary meristem upsurges the size of the internode.
17. Which of the following pigments gives the yellow colour to leaves, fruits and flowers?
[A] Chlorophyll
[B] Haemoglobin
[C] Anthocyanin
[D] Xanthophyll
Show Answer
Correct Answer: D [Xanthophyll]
Notes:
Xanthophyll is the pigment that provides yellow color to leaves, fruits, and flowers. Here Xanthos stands for yellow, phyllon means leaf.
18. In which of the following hormones is stimulation growth factor found?
[A] Gibberellins
[B] Cytokinins
[C] Auxins
[D] Abscisic Acid
Show Answer
Correct Answer: B [Cytokinins]
Notes:
The stimulating growth factor was found to be cytokinin, a hormone that promotes cell division.
19. Which of these carry water into a leaf?
[A] Leaf blade
[B] Veins
[C] Chlorophyll
[D] Roots
Show Answer
Correct Answer: B [Veins ]
Notes:
Veins carry water into a leaf. The veins in leaves are made up of two major tissues xylem and phloem.
20. Animals having well-marked digestive cavities are included under__
[A] Parazoa
[B] Enterozoa
[C] Mesozoa
[D] Metazoa
Show Answer
Correct Answer: B [Enterozoa]
Notes:
Animals having well-marked digestive cavities are included under Enterozoa.
