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aliya0001 [1]
3 years ago
8

Based on the organization of living things, tissues

Biology
1 answer:
Lubov Fominskaja [6]3 years ago
7 0

Answer:

b is the correct answer for your question

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Abiotic Factors + Biotic Factors =
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Examples of abiotic factors are water, air, soil, sunlight, and minerals. Biotic factors are living or once-living organisms in the ecosystem. These are obtained from the biosphere and are capable of reproduction. Examples of biotic factors are animals, birds, plants, fungi, and other similar organisms.

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Chyme entering the large intestine normally consists of __________.
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Indigestion fiber, enteric bacteria, water
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Describe the four combinations of active or inactive regulatory proteins that could be present at any time in the cell
Natalka [10]
<h2>Answer:</h2>

Following are the four combinations of active or inactive regulatory proteins that could be present anytime in the cell:

  1. Active repressor , Active activator
  2. Active repressor, Inactive activator
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3 years ago
In colorectal cancer, some tumor suppressor genes are inactive. This is an important factor resulting in uncontrolled cell divis
tresset_1 [31]

Answer/Explanation:

(1) a mutation in the coding region, resulting in an inactive protein

To check to see if there is a mutation, you could extract the DNA from the cancer cells and then perform PCR to amplify the gene of interest. You could then perform sanger sequencing and compare the sequence to the normal gene to see if a mutation is present. To test the effect of the mutation, you would want to see if an active protein has been formed.

To see if a normal sized protein has been formed, you could perform a western blot, comparing the protein band to the WT protein band. If the protein is absent or much smaller, it is likely not a functional protein.

(2) epigenetic silencing at the promoter of the gene, resulting in reduced transcription.

To check for changes in the epigenetic landscape of the promoter, you could perform chromatin immunoprecipitation by extracting the chromatin from the tumour cells and using antibodies for different chromatin marks to see what has changed between the normal cells and the tumor cells. E.g. H3K9me3, H3K27me3. You would perform a pull down with the antibody of interest and then PCR for your promoter to specifically look at changes at that gene compared to normal cells. To test DNA methylation, you could perform bisulfite sequencing.

To see how transcription is affected, you could extract RNA from the tumor and normal cells, and compare the levels of RNA between the two samples by qRT-PCR

3 0
3 years ago
Define and explain conservation.
timurjin [86]

Answer:

conservation is saving and reducing. To help save the earth ..  Conservation is the preservation or efficient use of resources,

Explanation:

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3 years ago
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