প্লান্ট ফিজিওলজি

• ০০। A bulk of nitrogen in nature is fixed by:
• ক) Symbiotic bacteria
• খ) Chemical industries
• গ) Lightning
• ঘ) Denitrifying bacteria

• ০১। A characteristic feature of ripening of some fruits (like banana) is a sudden increase in respiration, which is known as:
• ক) Anthesis
• খ) Photorespiration
• গ) Climacteric
• ঘ) Climatic

• ০২। A final component of thylakoid necessary for photophos-phorylation is a complex protein called:
• ক) ATPase/coupling factor
• খ) Detaching factor
• গ) Reductase factor
• ঘ) None of these

• ০৩। A free-living anaerobic bacterium capable of N2 fixation in soil is:
• ক) Azotobacter
• খ) Streptococcus
• গ) Clostridium
• ঘ) Rhizobium

• ০৪। A maize plant to produce one kg of grain (dry) transpires _____ kg of water:
• ক) 900
• খ) 800
• গ) 700
• ঘ) 600

• ০৫। A micro-essential element is one which:
• ক) Is less important than the major essential element
• খ) Is more important than the major essential element
• গ) Is present in small quantities in the soil
• ঘ) Is needed in very small amounts but is as important as a major essential element

• ০৬। A natural growth regulator (hormone) is:
• ক) Benzaldehyde
• খ) 2, 4-D
• গ) N.A.A.
• ঘ) Ethylene

• ০৭। A plant is kept in 30 ppm. of CO2 concentration what will happen to it?
• ক) Plant will not grow but will not die
• খ) Plant will show normal photosynthesis
• গ) Plant will die soon
• ঘ) Plant will grow faster

• ০৮। A plant, which needs not less than 10 hours of light to flower, is:
• ক) Long day plant
• খ) Short day plant
• গ) Day neutral plant
• ঘ) None of these

• ০৯। A thoroughly cleaned goat bladder if filled with syrup, tightly tied immersed in a vessel of water:
• ক) Plasmolysis will occur
• খ) The volume of the liquid within the bladder will remain constant
• গ) The volume of liquid within the bladder will increase
• ঘ) The volume of liquid within the bladder will decrease

• ১০। A trace element essential for plant grwoth and radio-isotope which is used in cancer therapy is known is:
• ক) Calcium
• খ) Cobalt
• গ) Sodium
• ঘ) Iron

• ১১। A trace element is:
• ক) That which draws other elements out of protoplasm
• খ) Radoactive can be traced by Geiger counter
• গ) Required in very minute amounts
• ঘ) That which was first found in protoplasm

• ১২। ABA (abscic acid) appears to be universal among:
• ক) Algae
• খ) Liveworts
• গ) Vascular plants
• ঘ) All mosses

• ১৩। ABA has the following effects depending upon the tissue involved:
• ক) On plasma membrance of roots
• খ) Inhibition of RNA-synthesis (transcription)
• গ) Inhibition of protein synthesis (translocation)
• ঘ) All of these

• ১৪। According to the fluid mosaic model the correct sequence of plasmalemma is:
• ক) L,-P,L,-P
• খ) L,-P-P,-L
• গ) P,-L,-L,P
• ঘ) P,-P,-L,-L

• ১৫। According to the mosaic model (proposed by Singer and Nicholoson) plasma membrance is composed of:
• ক) Phospholipids and integrate proteins
• খ) Phospholipids, extrinsic proteins, intrinsic proteins
• গ) Phospholopids and hemicellulose
• ঘ) Cellulose and hemicellulose

• ১৬। Aerobic respiration is more advantageous to a large organism than anaerobic respiration because aerobic respiration:
• ক) Does not require sunlight
• খ) Produce oxygen as a waste product
• গ) Does not require molecules oxygen and hydrogen
• ঘ) Releases more energy from an equal amount of nutrients

• ১৭। Alcohol is produced during the process of:
• ক) Photosynthesis and respiration
• খ) Aerobic respiration
• গ) Anaerobic respiration
• ঘ) None of the above

• ১৮। Algae float in water during daytime and sink during nighttime because:
• ক) They become light due to consumption of food materials in respiration
• খ) They become buoyant in light due to accumulation of oxygen bubbles released in photosynthesis
• গ) They come up to enjoy sunshine
• ঘ) They loose weight at night

• ১৯। All the membrane bounded cell organelles except:
• ক) Spherosomes
• খ) Mitochondria
• গ) Ribosomes
• ঘ) Lysosomes