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Answer:
Total 40 sister chromatids
Explanation:
A cell cycle comprises of various phases that includes G1 phase, S phase, G2 phase, Mitosis and cytokinesis.
- During G1 phase the cell grow in size and almost all of the content of cell is duplicated except the DNA. The cell contains chromosome with a single copy of DNA.
- During S phase the the the DNA is duplicated and each cell have chromosome with two sister chromatids.
- G2 phase came after the DNA duplication and recheck the DNA duplication for errors.
As G2 phase occur after DNA duplication so each chromosome in this phase contains two sister chromatids that's why the corn plant with 20 chromosomes would contain 40 sister chromatids in G2 phase.
Answer:
Explanation:
When an RNA transcript is first made in a eukaryotic cell, it is considered a pre-mRNA and must be processed into a messenger RNA (mRNA). ... In splicing, some sections of the RNA transcript (introns) are removed, and the remaining sections (exons) are stuck back together.
Answer:
All statements are true.
Explanation:
Histamine is the chemicals released during the inflammatory and allergic reaction of the body. Histamine causes the capillaries dilation and the smooth muscle contraction.
Histamine works as the G protein coupled receptor. It depends on the tupe of molecules associated with it. The molecule that are activated by the enzyme is linked with O receptor. Histamine receptor and its binding with the molecule acts as the signalling molecule. The secondary messengers like cAMP, cGMP are also involved in the signal transduction pathway.
Thus, all statements are apply.
