What are the options they gave you?
Describe<span> how </span>eukaryotic cell's chromosomes change as a cell prepares to divide<span>. Before </span>cell<span> division each </span>chromosome<span> is replicated. At the beginning of division each </span>chromosome<span> has two daughter chromatids. ... A scientist treats </span>cells<span> with a chemical that prevents DNA synthesis.</span>
Answer:
b c and d
Explanation:
they are from different species therefore would not compete for same mates.
Answer:
A- A pH change can cause the enzyme to change its shape
Explanation:
A rise or fall in the pH of the medium from the optimum of pH 7 usually affect the enzymes' active sites of and therefore the shape and the rate of enzyme activity.
Assuming the pH is too low, the enzyme medium becomes acidic;Acidosis. The high Hydrogen ions concentration interacts with the R-groups of the amino acids moiety of the enzymes, this interaction affects the ionization of the R-groups, disrupting the ionic bonding holding these R-groups in shape.
This results in loss of the 3-Dimensional shape arrangements of the protein molecule and therefore of the active sites. Since active sites of enzymes determines the specificity of the <u>enzymes substrate- complex </u> to give <u>enzyme-product complex,</u> the catalytic activity of the enzymes decreases, <u>the rate of reaction decreases,and products formation stops, and the reaction also stops.</u>
The same is applicable to extremely high pH=Alkalosis.
However, the effective buffer system of the body prevents this scenarios from happening in real sense in the body. Through mopping by the haemoglobin, excretion by the kidney, etc
<span>D is the correct answer. Lipids only dissolve (are soluble) in non polar solvents, which are liquid solvents whose electrical charges (from electrons) are not present or are cancelled out. Lipids include fats, waxes, some vitamins that are fat-soluble and other molecules.</span>
