Answer:
DNA synthesis might be terminated after the addition of any adenine base (at random). DNA molecules of many different lengths would be produced.
Explanation:
Polymerase chain reaction may be defined as the molecular process of increasing the amount of DNA upto several times. Three important steps in PCR - denaturation, annealing and extension.
As given in the question, dd ATP ( dideoxy adenosine triphosphate) is added to the PCR reaction. ddATP lacks the hydroxyl group at 3' position of the sugar. This means the reaction will be terminated after this ddATP as no further nucleotide will be added. This will also leads to the genereation of the different length of DNA fragments as ddATP will randomly be inserted in the DNA molecule.
Thus, the correct answer is option (3) and (4).
Reuben.
Low sperm count does equate to impotence, and neither does descended testicles or erectile dysfunction.
Answer:
Statements 1, 2 and 4 are correct:
"Hormones can be peptides, steroids, or amino acid derivatives."
"Hormones can stimulate the synthesis of target proteins through the activation of specific genes."
"Hormones can increase the cellular uptake of metabolites."
Explanation:
Hormones are basically proteins that are released under particular conditions to bring about a certain response in the body. They can activate genes and even change how cells respond to metabolites, for instance, insulin and glucagon are two hormones that regulate the level of sugar in the blood. Another example is the hormone adrenaline, which is released in the 'flight-or-fight' response to prepare the body in taking action.
Hope that answers the question, have a great day!
Spongy bone is very soft and is within the bone while compact bone protects the organs found in the bone.
Water drains into the sinkhole pollution due to factories
The lake was created as limestone gradually dissolved, causing the sediment layer above it to collapse and creating the lake basin. Low lake levels and slow draining can be caused by bottom leaks, sinkholes, and swallets, long-term dryness, and a lack of recent, strong rainfall events.
<h3>What causes lake Jackson to disappear ?</h3>
Before the lake dried up, those walking along the shore of the sinkhole at Lake Jackson on Thursday would have been in three to four feet of water.
- Environmentalists refer to the process as a "dry down," and it occurs every ten or twenty years. The likelihood of causes includes dry weather, a lack of rain, and a decreased water table.
- The lake will typically begin to fill again after the sinkhole plugs itself, sometimes taking years to do so pre sinkhole level
Learn more about Lake Jackson here:
brainly.com/question/23942365
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