Answer:
A
If the level of thyroxine in the blood is high then the pituitary gland releases less TSH. Therefore, a low level of TSH means that your thyroid gland is overactive and is making too much thyroxine. Thyroxine (T4). A high level of T4 confirms hyperthyroidism
4. DNA sequence comparison
5. Random mutations
The correct answer is: Endoplasmic reticulum.
One of the functions of the endoplasmic reticulum is transport of secretory proteins. Synthesized proteins are transported in vesicles to the Golgi apparatus.
Gastric chief cells have a high rate of enzyme secretion such as pepsinogen and gastric lipase. It is the cell also responsible for secretion of chymosin.
I believe the answer is D, are expensive to purchase.
Well, sort of, but not really. There is a bit of ambiguity in what you mean by “<em>cell division</em>”.
In eukaryotes (which I will assume you are studying cell division for), there are two main types of cell division: mitotic and meiotic.
For mitotic cell division, DNA replication occurs during the cell cycle, but in the S phase of interphase … not during mitosis (nuclear division) or cytokinesis (division of the cytoplasm).
However, DNA replication is required in order for mitotic cell division to occur; and DNA replication doesn’t begin until the cell has become ‘committed’ to entering mitosis.
For meiosis, DNA replication also occurs in the S phase of interphase, but only before the first round of cell division (associated with Meiosis I); before the second round of cell division (associated with Meiosis II), DNA replication does not occur.