The two subunits of ribosome remain united at a critical ion level of
Copper
Manganese
Manganese
Manganese
C.
Manganese
Magnesium is required in leaves, growing areas of root and stem protein synthesis hence, withdrawn from ageing. It is a constituent of chlorophyll, middle lamella, and connects with phosphate transfer in respiration, binding of ribosomes and DNA and RNA synthesis.
Manganese activates enzymes of respiration, photosynthesis and nitrogen metabolism performing oxidation, reduction decarboxylation. photolysis of water etc.
Copper is an activator of plastocyanin cytochrome oxidase, RuBP carboxylase and many other enzymes. It functions in electron transfer, maintenance of carbohydrate/nitrogen balance, chlorophyll synthesis etc.
Calcium is a constituent of middle lamella, an activator of enzymes connected with chromosome formation and many aspects of metabolism.
In leaves of C4 -plants malic acid synthesis during CO2 -fixation occurs in
epidermal cells
mesophyll cells
bundle sheath
bundle sheath
Carbohydrates are commonly found as starch in plant storage organs. which of the following five properties of starch (A-E) make it useful as a storage material?
A) Easily translocated
B) Chemically non-reactive
C) Easily digested by animals
D) Osmotically inactive
E) Synthesized during photosynthesis
The useful properties are
(B) and (C)
(B) and (D)
(A), (C) adn (E)
(A), (C) adn (E)
The slow rate of decomposition of fallen logs in nature is due to their
low moisture content
poor nitrogen content
anaerobic environment around them
anaerobic environment around them
Which one of the following scientist's name is correctly matched with the theory put forth by him?
Weissmann-Theory of continuity of germplasm
Pasteur - Inheritance of acquired characters
de Vries - Natural selection
de Vries - Natural selection
Cellulose is the major component of cell walls of
Pythium
Xanthomonas
Pseudomonas
Pseudomonas
During the propagation of a nerve impulse, the action potential results from the movement of
K+ ions form extracellular fluid of intracellular fluid
Na+ ions from intracellular fluid to extracellular fluid
K+ ions from intracellular fluid to extracellular fluid
K+ ions from intracellular fluid to extracellular fluid
The haemoglobin of human foetus
has a lower affinity for oxygen than that of the adult
its affinity for oxygen is the same as that of an adult
has only 2 protein subunits instead of 4
has only 2 protein subunits instead of 4
The most active phagocytic white blood cells.
neutrophils ane eosinophils
lymphocytes and macrophages
eosinophils and lymphocytes
eosinophils and lymphocytes
