1) how is cell division normally controlled

Biology

1 answer:

Anon25 [30]3 years ago

6 0

Answer:

some specific safeguard protein are present

Explanation:

the specific protein which are present at G1 phase name cyclin dependent kinase they also initiate dna division

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Meselson and Stahl used density labeling of DNA to show that DNA replication occurs via a semiconservative mechanism. In their e

cricket20 [7]

Answer:

The organism previously used 15N for replication so all the DNA molecules were of 15N15N type. Then the organism is shifted to a medium where only 14N is available for replication.
According to semi conservative mode of replication, a newly synthesised DNA molecule consists of one new strand and one parental strand. So after the first round of replication, All the 15N strands will synthesise new DNA strands using 14N resulting into intermediate 15N14N DNA molecules. Hence, only one band would be observed (15N14N) above the original 15N15N band since 15N14N has lighter isotope too so it will be lighter than 15N15N molecules and will lie above it.
After second round of replication, 15N strand from 15N14N would synthesise another 14N strand. 14N strand from 15N14N molecules will also synthesise another 14N strand. So now, 50% of the DNA molecules will be of 15N14N intermediate type and 50% of them will be of 14N14N type.Two bands will be observed above the original 15N15N band. One band of 15N14N molecules will be right above it and other band of 14N14N molecules will be even higher because it is the lightest band since it has only the lighter isotope of nitrogen.

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3 years ago

How are freshwater environments, such as rivers and lakes, being impacted by human activity

Rama09 [41]

Answer:

they are being impacted negativily and this is what they are being impacted by industrial dumping, pesticides, and agricultiural fertilizer can end up in rivers, lakes, streams, etc.

Explanation:

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3 years ago

Which of the following is characteristic of prokaryotic genomes but NOT eukaryotic genomes? 1. histones

AnnZ [28]

Answer:

4. Circular Chromosomes

Explanation:

We know that eukaryotic chromosomes consist of double-stranded DNA.

But prokaryotic chromosomes are actually circular, which is very different from eukaryotic.

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3 years ago

If the line graph has a broken line between the points, then _____.

kodGreya [7K]

the data is not actual data and is only an approximation. I got 100 on a test, your welcome))

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3 years ago

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5. Why are there fewer women than men in India

Paraphin [41]

Answer:

Poverty is the root of all evil in this situation along with gendder discrimination. Because of the social unpopularity regarding females and because many women lie below standard income, they simply cant afford or just refuse to have kids.

Explanation:

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3 years ago