Answer:
Methotrexate inhibits the synthesis of DNA, RNA, and protein synthesis of the cells in the experiment.
Explanation:
Methotrexate competitively inhibits the enzyme dihydrofolate reductase (DHFR) which is involved in the synthesis of tetrahydrofolate from the inactive dihydrofolate. The methotrexate blocks the enzyme by binding to its active site thereby preventing further reaction of the dihydrofolate reductase enzyme and dihydrofolate. Tetrahydrofolate is a useful material for the de novo synthesis of thymidine, a nucleoside. And without thymidine, DNA synthesis is hindered. Methotrexate therefore inhibits the synthesis of DNA, RNA, thymidylates and of course protein synthesis.
Answer:
See the answer below
Explanation:
In order to test for starch and distinguish the beaker containing a mixture of startch and water, a small quantity of the solutions in each beaker should be taken and and drops of iodine added. The solution that gives off a <u>blue/black</u> color from the yellow/brown color of the iodine would be the starch water solution.
<em>Generally, starch turns iodine solution to blue/black from the usual yellow/brown color of the substance.</em>
Because they are built with overlapping sand and they can break easily.
C. The nuclear envelope contains the nucleus and forms a barrier between it and the cytoplasm
Answer:
The correct answer is option D. "trait".
Explanation:
The trait perspective of personality is an approach that describes personality as a relatively stable characteristic of an individual. Similar to physical traits, this approach considers that personality is composed of dispositions and is focused on differences between individuals. Dr. Chen probably would identify with the trait perspective of personality, since Dr. Chen is focused on measuring differences between individuals personality as well.
