<span>. Messenger RNA (mRNA) is
synthesized from a gene segment of DNA which ultimately contains the
information on the primary sequence of amino acids in a protein to be
synthesized. The genetic code as translated is for m-RNA not DNA.
The messenger RNA carries the code into the cytoplasm where protein
synthesis occurs. The cell does
not contain large quantities of mRNA. This is because mRNA, unlike other RNAs
is constantly undergoing breakdown.
2. In
the cytoplasm, ribsomal RNA (rRNA) and protein combine to form a
nucleoprotein called a ribosome. The ribosome serves as the site and
carries the enzymes necessary for protein synthesis. The ribosome attaches
itself to m-RNA and provides the stabilizing structure to hold all substances
in position as the protein is synthesized. Several ribosomes may be attached to
a single RNA at any time. </span>
<span>
3. Transfer
RNA (tRNA) contains about 75 nucleotides, three of which are called
anticodons, and one amino acid. The tRNA reads the code and carries the
amino acid to be incorporated into the developing protein. Part of the
tRNA doubles back upon itself to form several double helical sections. The
tRNA "reads" the mRNA codon by using its own anticodon. The actual
"reading" is done by matching the base pairs through hydrogen bonding
following the base pairing principle. Each codon is "read" by various
tRNA's until the appropriate match of the anticodon with the codon occurs.</span>
Answer:
Explanation:
Genetics play a key part in understanding evolution. While two organisms may bear similar or no resemblance whatsoever to each other, their genes can tell us whether or not they were related- and creatures that show change (especially dramatic change) show us evolution through genetics.
<span>The nervous system is the organized structure of nerve endings and cells called neurons. It runs throughout the body, and it's why we feel and respond to our circumstances, environment and life events the way we do. Anatomists classify the system structurally. It is organized and labeled as a bodily whole divided into two classified systems, one at the center of the system and the other making up its peripheral edges.</span>
Answer:
Mitochondria are the "powerhouses" of the cell, breaking down fuel molecules and capturing energy in cellular respiration. They're responsible for capturing light energy to make sugars in photosynthesis.
so true i'm pretty sure i hope it helps
The secondary xylem is produced by the cambium. It is placed between the cambium and the medulla. Option B is correct. Secondary xylem.
<h3>What is the secondary xylem?</h3>
The secondary xylem is the tissue that proceeds from the vascular cambium activity.
Its cells are orientated in different ways composing the vertical/axial system and the horizontal/transversal system.
The secondary xylem is essential to the tree growth in high because of its resistance and the capacity to transport water long distances.
Secondary xylem functions are to transport water and minerals through its vessels and tracheids, to provide support and resistance to the plant, and to store reserve substances.
In the cross-section of the adult tree trunk,
- The outermost layer that interacts with the environment is called periderm (Brown Layer).
- The second layer that follows the periderm is the phloem (Layer C).
- The next layer is the cambium (lateral meristem), which produces phloem cells and xylem cells (Layer B).
- The secondary xylem follows the vascular cambium (Layer A), and
- The medulla is located in the centre of the trunk.
Letter A indicates the <u>secondary xylem</u>.
You will learn more about the secondary xylem at
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