Examples of proteins for cells include _________?

Biology

1 answer:

Elza [17]3 years ago

6 0

Insuilin, how many examples do you need?

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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

Biologists recognize the following levels of cell organization: _____.

Assoli18 [71]

<span>In the sentence "Biologists recognize the following levels of cell organization: _____, the choice that correctly completes the sentence is b. cellular, tissue, organ, system, and organism. A cell is the basic unit of living organisms. The group of similar cells that work together to perform a specific job is a tissue. The group of multiple tissues joined together in the functional structure is an organ. Functionally related organs form organ systems, which all together form one organism.</span>

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Read 2 more answers

What statement is true about a cell

vagabundo [1.1K]

Answer:

If you have anyone of these answer choices..Its D.All of the Above

Explanation:

A. Cells are the structures that contain all of the materials necessary for life

B. Cells are found in all organisms

C. Cells are sometimes specialized for particular functions

D. All of the above

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What are the motion?

Kazeer [188]

Answer: imma say dragon fly

Explanation: I think its a dragon fly

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Solar tracking, or _____, is a plant's growth toward light.

GrogVix [38]

Phototropism as photo means light
eg: photosynthesis

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