Answer:
B) Cells will pass through the G1/S checkpoint even if conditions are not ideal for cell division.
Explanation:
The cells will pass through the G1/S checkpoint even if conditions are not ideal for cell division. Because cyclin E is an activator of CdK 2 which stimulates functions of cell entry into S phase.
The most important regulators of Cdk are called cyclin proteins. Cyclines are a family of proteins involved in cell cycle regulation. Cyclines form complexes with cyclin-dependent kinase enzymes (Cdks), activating their kinase function in the latter.
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Water ions, oxidation can also occur in cell respiration
The answer is; Formation of sea ice increases the salinity of the oceans
When ice form in water, this water is ‘osmotically isolated’ (in solid form) hence making liquid water become lesser in quantity than before. Since the number of dissolved salts remain more or less the same and the liquid water in which it is dissolved has reduced, then the water becomes more concentrated (because they are now more ppm of salts in each cubic amount of the water).
The 3 - carbon molecules formed in the light independent reactions of photosynthesis are important precursors to the main products of photosynthesis namely glucose, starch and cellulose. They are necessary for making these end products
The 3 - carbon molecules that are formed are:
1. 3- phosphoglycerate (3-PGA) - formed in the first stage of light independent reactions when a molecule of carbon dioxide gas is attached to a molecule of ribulose. The newly formed 6 -carbon sugar quickly breaks down into two identical 3 carbon molecules, 3 -PGA.
2. Glyceraldehyde 3 phosphate (G3P) - formed when one phosphate molecule is removed from 3 - PGA.
G3P is then used to make glucose, sucrose, starch, cellulose and other carbohydrates essential for the plant.