Answer:
Is made of a lipid trilayer
Explanation:
The lipid bilayer (or phospholipid bilayer) is a thin polar membrane made of two layers of lipid molecules. These membranes are flat sheets that form a continuous barrier around all cells.
The right answer is B.
Nitrogen fixation is done by decomposers that are prokaryotes (bacteria).
<u>Take the example of legumes.
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The different species of rhizobia bacteria, which are able to infect the roots of legumes (Fabaceae family), are specific to certain host plants. Rhizobium phaseoli infects beans (Phaseolus sp).
Bacteria cause the formation of nodules on the roots by penetrating the root hairs, and transform into larger "bacteroids". The nodules are the seat of a symbiotic activity in which the plant provides the sugars and energy from photosynthesis, and in return benefits from the amino acids that are produced there.
Answer:C
Explanation:
It is important for the cell not to activate glycolysis and gluconeogenesis at high rate simultaneously because it is expensive for the cell.
In the break down of one molecule of glucose to pyruvate, one ATP is used in the conversion of glucose to glucose-6-phosphate and one ATP is used in the conversion of fructose-1-phoshate to fructose-1,6-biphosohate. While a total of four ATPs are produced.
Making it a net gain of 2 ATP in glycolysis.
Gluconeogenesis produces no ATP and requires equivalents of 6 ATP (4 ATP and 2GTP) for one molecule of glucose produced.
(Glycolysis +2ATP) + (gluconeogenesis -6ATP) = -4ATP
There's a net loss of 4ATP if both reactions are activated simultaneously.
Answer:
Prophage
Explanation:
Prophage is a viral genome (e.g. bacterihage genome) which is inserted into host genome (e.g. bacterial genome). Such integrated genome-prophage is in its latent phase, because there is no lysis or disruption of host cell. After the latent period, prophage induction occurs in which viral replication begins.
The term prehistory includes all of human existence prior to the emergence of writing.
