Which ofthe following is not true for a species?
Members of a species can interbreed
Variations occurs among members of a species
Each species is reproductively isolated from every other species
Gene flow does not occur between the populations of a species
One of the most important functions of botanical gardens is that
one can observe tropical plants there
they allow ex situ conservation of germplasm
they provide the natural habitat for wild life
they provide a beautiful area for recreation
During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP?
Conversion of pyruvic acid to acetyl Co-A
Electron transport chain
Glycolysis
Krebs cycle
B.
Electron transport chain
In glycolysis, 4 ATP and 2 NADH2 molecules are formed. These 2 NADH2 molecules go to electron transport chain.
In oxidative decarboxylation no ATP molecules are formed but two molecules of NADH2 are formed from two molecules of pyruvate. And both NADH2 molecules go to ETC (Electron Transport Chain).
In Krebs cycle 2 ATP, 6NADH2 and 2FADH2 molecules are formed from two molecule of acetyl Co-A. These NADH2 and FADH2 go to ETC.
In ETC all NADH2 and FADH2 pass to electron carriers and yield 3 ATP and 2 ATP molecules per NADH2 and FADH2 respectively. Thus,
4 ATP are formed in glycolysis
2 ATP in Krebs cycle and
34 ATP from electron transport chain
40 ATP
2 ATP molecules are used during glycolysis.
So, net gain of ATP molecules during one complete oxidation of a glucose molecule is 38 ATP.
Ectophloic siphonostele is found in
Adiantum and Cucurbitaceae
Osmunda and Equisetum
Marsilea and Botrychium
Dicksonia and maiden hair fem
Which of the following represents the edible part of the fruit of litchi?
Pericarp
Mesocarp
Juicy aril
Endocarp
Carbohydrates, the most abundant biomolecules on earth, are produced by:
all bacteria, fungi and algae
fungi, algae and green plant cells
some bacteria, algae and green plant cells
viruses, fungi and bacteria
The deficiencies of micro-nutrients, not only affects growth of plants but also vital functions such as photosynthetic and mitochondrial electron flow. Among the list given below, which group of three elements shall affect most, both photosynthetic and mitochondrial electron transport ?
Cu, Mn, Fe
Co, Ni, Mo
Mn, Co, Ca
Ca, K, Na
Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on
proton gradient
accumulation of K ions
accumulation of Na ions
membrane potential
Which one of the following pairs is mismatched?
Savanna - Acacia trees
Prairie - Epiphytes
Tundra - Permafrost
Coniferous forest - Evergreen trees
Potometer works on the principle of
amount of water absorbed equals the maount transpired
osmotic pressure
root pressure
potential difference between the tip of the tube and that of the plant