Answer:
B. Virus
Explanation:
Once attached to a host cell, a virus injects its nucleic acid into the cell. The nucleic acid takes over the normal operation of the host cell and the host cell produces multiple copies of the virus.
Answer:
approximately 150 amino acids
Explanation:
Proteins are produced from genes via a process called gene expression. In this process, the gene-containing DNA is first transcribed into mRNA molecule, which is subsequently translated into an amino acid sequence that makes up the protein molecule.
However, during the translation process, the mRNA molecule is read in a group of three nucleotides called CODON i.e. a codon is made up of three nucleotide/nitrogenous bases. Each codon codes for a particular amino acid.
Since one codon of a mRNA that is three (3) nucleotides long codes for one amino acid, hence, strand of mRNA that is 450 nitrogenous bases long will produce a protein containing approximately (450/3) = 150 amino acids.
Answer:
The correct answers are "The heart is posterior/dorsal to the sternum" and "The lungs are deep to the ribs".
Explanation:
It is not true that the heart is posterior/dorsal to the sternum. Actually, it is considered that the heart is deep to the sternum, as well as the aorta, vena cava, and thymus gland. On the other hand, the lungs are posterior/dorsal to the ribs. The lungs are located in the thoracic cavity, which is extending anteriorly and laterally to the ribs.
<span>X-linked recessive is the type of inheritance pattern that hemophilia and color blindness show.</span><span>
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Answer:
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