Answer: <span>inorganic phosphate 3'-oh end of the new DNA strand;
all four
deoxyribonucleotides triphosphates (containing a, c, t, or g) ;
single-stranded dna template
</span>
<span>DNA polymerase will add free nucleotides only to the 3' end of the new strand but only if there is a pre-existing 3'-OH group.
The enzyme DNA polymerase will form hydrogen bonds with the nucleotides of the template DNA and add new nucleotides, adenine will bond with thymine and
guanine will bond with cytosine.
The replication process has produced
a new DNA molecule by using the original strand as a template and the
new strand formed which is identical</span>
Answer:
True
Explanation:
The bacterial cultivation refers to growing the bacterial species for exploitation or use. But the humans are not able to cultivate the majority of the bacterial species present which could be accounted for many reasons.
The bacteria can mutate very easily through the exchange of genetic material. Some bacterial species cannot be isolated. New bacterial species are discovered in less period of time and some species fail to grow on the growth medium due to lack of information. Till now only one percent of bacterial species have been cultivated.
Thus, true is correct.
Answer:
The Miller and Urey experiment is a well-known classic experiment in which hypothetical conditions of the early Earth's evolution were simulated to test the possibility of chemical evolution. In fact, this was an experimental test of the hypothesis previously expressed by Alexander Oparin and John Haldane that the conditions that existed on primitive Earth promoted chemical reactions that could lead to the synthesis of organic molecules from inorganic ones. It was held in 1953 by Stanley Miller and Harold Urey. The apparatus designed for the experiment included a mixture of gases corresponding to the notion of the composition of the atmosphere of the early Earth in the 1950s, and electric discharges passing through it (simulating lightning strikes on the ground). The Miller and Urey experiment is considered one of the most important experiments in the study of the origin of life on Earth.
