Biology MCQS

441. The main types of plastids are:
(A. Chloroplasts)
B. Chromoplasts
C. Leucoplasts
D. All of these

442. Fibers of the extracellular matrix are characteristic of:
(A. Plant cell wall)
B. Bacterial cell wall
C. Cell membrane of bacteria
D. Fluid mosaic model of the cell membrane

443. Polysome is formed during which process?
A. Transcription
B. Secretion
(C. Translation)
D. Division

444. Savannahs are?
A. Tropical rainforest
B. Dense forest with a closed canopy
(C. Grassland with scattered trees)
D. Grassland with closely grown trees

445. Identify the pollutant responsible for the curling of leaves?
A. O3
B. CO
C. H2S
(D. SO2)

446. Terrestrial biodiversity is found to be greater near the __.
A. North pole
B. South pole
(C. Equator)
D. Tropics of cancer

447. _ gland is pea-sized.
A. Adrenal
(B. Pituitary)
C. Hypothalamus
D. Pancreas

448. At a level above _ sound turns into harmful noise pollution.
A. 30 dB
B. 100 dB
C. 120 dB
(D. 80 dB)

449. Kranz anatomy is a characteristic feature of?
A. C3 plants
(B. C4 plants)
C. C2 plants
D. CAM Plants

450. Smooth muscles, cardiac muscles, and glands are regulated by?
A. Central nervous system
B. Parasympathetic Nervous system
C. Sympathetic nervous system
(D. Autonomic nervous system)