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Crazy boy [7]
3 years ago
5

What is the main difference between a cell nucleus and a nucleoid?

Biology
2 answers:
Ivanshal [37]3 years ago
8 0
A. the presence or absence of a surrounding membrane
laila [671]3 years ago
7 0

Answer:

the correct answer is A

Explanation:

your mom told me when i banged her lol

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Three questions to answer you can do however much you want but PLEASE ANSWER
Dmitriy789 [7]
First quetion is the 2 one the second quetion is hybrid and the third quetion is forms
8 0
3 years ago
The p53 gene is important to the cell cycle in G1 and G2, and cancer. What happens to the cell cycle when a mutation occurs in t
german

Answer:

PFFT this might help? sorry if not mate

Explanation:

Cell cycle checkpoint controls play a major role in preventing the development of cancer [see Sherr, 1994, for a more detailed discussion]. Major checkpoints occur at the G1 to S phase transition and at the G2 to M phase transitions. Cancer is a genetic disease that arises from defects in growth-promoting oncogenes and growth-suppressing tumor suppressor genes. The p53 tumor suppressor protein plays a role in both the G1/S phase and G2/M phase checkpoints. The mechanism for this activity at the G1/S phase checkpoint is well understood, but its mechanism of action at the G2/M phase checkpoint remains to be elucidated. The p53 protein is thought to prevent chromosomal replication specifically during the cell cycle if DNA damage is present. In addition, p53 can induce a type of programmed cell death, or apoptosis, under certain circumstances. The general goal of p53 appears to be the prevention of cell propagation if mutations are present. The p53 protein acts as a transcription factor by binding to certain specific genes and regulating their expression. One of these, WAF1 or Cip1, is activated by p53 and is an essential downstream mediator of p53-dependent G1/S phase checkpoint control. The function of p53 can be suppressed by another gene, MDM2, which is overexpressed in certain tumorigenic mouse cells and binds to p53 protein, thus inhibiting its transcriptional activation function. Other cellular proteins have been found to bind to p53, but the significance of the associations is not completely understood in all cases. The large number of human cancers in which the p53 gene is altered makes this gene a good candidate for cancer screening approaches.

5 0
3 years ago
Match the job role to the description of the work done by the professional.
loris [4]

Answer:A) Aquarist- Tony spends his time at work preparing feed and cleaning the tanks of the marine creatures on display. B) Marine educationist-Clayton works in a firm advising oil exploration companies about the impact of their activities.

C) Environmental consultant-Glenda runs a campaign to stop sand mining in the estuary that lies near her town.

D) Environmental lobbyist-Hazel works in a tour operating company interacting with and answering questions from tourists about the coral reefs in the Florida Keys.

Explanation:

4 0
2 years ago
Which statement best describes how an Alaskan spruce reacts to fire A.resistance B.resilient C.tolerant D.pioneer
agasfer [191]
The correct option is RESILIENT.
The Alaskan forest usually undergo fire incident every year in order to enhance nutrient cycling of the ecosystem. Alaskan spruce is one of the plant find in the Alaskan forests and it is a very resilient plant, in that, when it is destroy by fire incident, it quickly grow back.
7 0
3 years ago
Read 2 more answers
A laboratory cat could be made to twitch its whiskers by direct stimulation of the ________ lobes of the cerebral cortex.
bagirrra123 [75]
The answer is Frontal lobes
8 0
2 years ago
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