I assume that this is your question with the options:
Proteins scan chromosomes for damage during:
A) the G1 checkpoint
B) Beginning of the synthesis phase
C) Apoptosis phase
D) G2 checkpoint
E) Metaphase checkpoint.
Answer:
The answer is option A): G1 checkpoint.
Explanation:
During the internal checkpoints for regulation of a cell cycle, proteins usually scan chromosomes for damage to DNA and evaluate other external factors at the G1 checkpoint in order to ascertain whether conditions are inadequate. If conditions are inadequate and damages exist, cells will not be allowed to continue to the next phase.
Answer:
The correct answer is ''aids in the passive movement of water out of the tubule''
Explanation:
The nephron loop has a descending branch, which goes to the renal medulla, and an ascending branch, which goes back to the cortex. The nephrons of these kidneys can have loops of Henle of different dimensions. The thin segment of the loop has thin epithelial membranes, its cells are highly permeable to water, but not to solutes. The water that exits from the descending portion of the nephron loop into the medullary space is immediately reabsorbed by the peritubular capillaries, causing osmolality to increase in both the tubular fluid and the medullary interstitial fluid. The characteristics of the descending branch differ from one species to another, the normal thing is that in one way or another, the osmotic concentration of the urine that moves through it is balanced with that of the interstitial fluid.
Answer: polyunsaturated fatty acid residues
Explanation: Unsaturated fatty acids have a lower melting point so arctic animals have these fatty acids in their membranes.
<span>Acids will break down the rocks, as the acids goes deep in the rocks cracks can form. When the cracks get to large the rock can break apart.</span>
