Answer:
D. The methyl group of acetyl CoA becomes radio-labeled
Explanation:
During the steps in glycolysis, the carbon at position 1, becomes C-1 in dihydroxyacetone phosphate during the cleavage of fructose-1,6-bisphosphate to dihydroxyacetone phosphate and glyceraldehyde-3-phosphate. Subsequently on isomerization of dihydroxyacetone phosphate to glyceraldehyde-3-phosphate, C-1 of dihydroxyacetone phosphate becomes C-3 of glyceraldehyde-3-phosphate.
Furthermore, in pyruvate, the end product of glycolysis, C-3 is converted to a methyl group which then becomes the methyl group in the acetyl-CoA molecule produced from the oxidative decarboxylation of pyruvate.
Since the radioactive 14-C of radio-labeled glucose occupies position 1, it will become the methyl group of acetyl-CoA.
Water typically diffuses in and out of cells depending on the concentration of solutes (other gunk not water) in both the cell and the external environment. Osmosis (the diffusion of water), happens from where the solute concentration is lowest to where the solute concentration is highest (or more sensibly, water travels to dilute the solute; so imagine if a cell with a lot of gunk in it swims into pure water, water will start to move into the cell).
Answer:
Pteridophyta Characteristics
Pteridophytes are considered as the first plants to be evolved on land: ...
They are cryptogams, seedless and vascular: ...
They are cryptogams, seedless and vascular: ...
Spores develop in sporangia: ...
Sporangia are produced in groups on sporophylls: ...
Sex organs are multicellular: ...
They show true alternation of generations:
Answer: Option A.
participate in innate immunity
secrete granzymes and perforin
Explanation:
Cytotoxic T (TC) cells are like natural killer (NK) cells because they both because participate in innate immunity they are components of innate immune system i.e white blood cells that fight against disease or act as defence for infections.
NK cells can recognize and destroy cells that have regulated MHC class I molecules from their cell surface. They recognise the viral pathogens and activate the receptor that bind to the target cell and it releases cytotoxic granules that contain perforin and granzymes, which leads to lysis of the target cell and then it's clear off the infection by producing antibodies.
Grasses and Grains are pollinated by the wind. and a plant is a pollinated seed that grows. there is a difference. most grasses are pollinated by the wind once again monocotyledonous flowering plants. flowers are pollinated by bees flying insects and butterflies. flowering plants must get pollen from one flower to another flower. either within a plant for self pollination or between plants of the same species for cross-pollination to occur however Paul and cannot move on its own thank goodness she had the wind and animals in rare cases water move for plantsg it is called the pollination syndrome
