Answer:
In most cells, DNA directs the production of a molecule of mRNA which then enters a ribosome. The ribosome produces the final product, a protein. Retroviruses do the opposite. They use the enzyme reverse transcriptase to use a template of mRNA to produce DNA.
Explanation:
The central dogma of molecular biology describes how a cell uses its genetic information to synthesize a protein. The first step called 'transcription' consists of using an RNA polymerase enzyme and a fragment of DNA (i.e., gene) as a template to synthesize an RNA molecule, usually a messenger RNA (mRNA). Subsequently, the genetic code in the mRNA sequence is read by the ribosomes in order to produce a protein, a process known as 'translation'. Retroviruses are viruses that have the ability to integrate into the host genome by using a reverse transcriptase enzyme that allows reverse transcription of mRNA to complementary DNA, which then integrates into the host's genome.
3. The answer is false, because protons are positive and electrons are negative. If there are more protons than electrons, then the atom would be positively charged.
The answer is false.
4. The answer is true, because if the number of protons and electrons are the same, then the charges would cancel out, leaving the atom negative.
The answer is true.
I hope this helps. :)
Is effect because you have to find in map]
A sugar<span>-phosphate </span>backbone<span> (alternating grey-dark grey) joins together nucleotides in a </span>DNA<span> sequence. The </span>sugar-phosphatebackbone<span> forms the structural framework of nucleic acids, including</span>DNA<span> and RNA. This </span>backbone<span> is composed of alternating </span>sugar<span> and phosphate groups, and defines directionality of the </span>molecule<span>.
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D) new antibiotic-resistant populations of bacteria.
PS: antiobiotics do not affect viruses but some doctors prescribe antibiotics to viral infections to prevent secondary bacterial infection.