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bearhunter [10]
2 years ago
7

A scientist discovers that a strand of DNA is 20% Guanine and 30% Adenine. What percent of

Biology
1 answer:
Lisa [10]2 years ago
7 0

Answer:

20% cytosine

30% thymine

Explanation:

Cytosine is paired with guanine so they must have the same percentage. Adenine is paired with thymine so they also must have the same percentage.

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Help me, anyone, if you would please
mote1985 [20]

Answer:

I would say C

Explanation:

unless the model has mathematical equations in the core, I don't think its A or B. and obviously it isn't interactive unless you want to melt your hand off so i would say C

6 0
3 years ago
What is biology? answer it clearly <br>good afternoon ​
Flauer [41]

Answer:

The biology is a branch of science which deals with living organisms

8 0
3 years ago
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Organisms need _____ to conduct essential life activities.
mars1129 [50]
Organisms need energy to conduct essential life activities. Basically, energy is essential to every organisms because it is their source of power to get food and to reproduce. Without it, organisms would not function properly and will soon die. 
5 0
3 years ago
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What differs among DNA structures of different species?
weqwewe [10]

Answer:

D) the arrangement of the nucleotides within genes

Explanation:

De-oxy ribo nucleic acid that is basically a polymer of nucleotides. Nucleotides are composed of three basic units: a de-oxyribose sugar unit, a phosphate group and nitrogenous bases that can be Adenine, Gunanine, Thymine and Cytosine.Adenine always pairs with Thymine and Guanine always pairs with Cytosine.

This is a universal composition of DNA in each and every living organism. The genes are a segment of DNA that contain specific sequence of nucleotides and encode for a specific trait of organism such as height, weight, eye color etc. The sequence of nucleotides expresses the trait in the form of protein product during the process of Translation. The products of translation are amino acids and every amino acids encode for a specific protein  in almost  all living organisms.

So, what differs in the specie is the sequence of nucleotides in genes. Infact this is the nucleotide sequence which brings evolution in organism and organisms evolve to form new specie with the passage of time. One major cause of change in nucleotide sequence is mutations due to which the organisms change with time.

Suppose the sequence of nucleotide of specific gene in organism A is

AAGGGGAAATTT

However in other specie organism B of same specie is:

TAGGGGAAATTT

This means only mutation of one base changed the gene in organism B and also its product called protein.

Hope it help!

8 0
3 years ago
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The inheritance of gene expression patterns, in the absence of the initiating signal, is called what
Veronika [31]

The inheritance of gene expression patterns, in the absence of the initiating signal, is called Epigenetic regulation.

Epigenetic changes can be defined as inherited variations which are not present in the DNA sequence. Gene expression is regulated at different levels and not merely in response to DNA modifications. Examples of epigenetic control include DNA methylation, histone deacetylation and mi-RNA expression.

Epigenetic mechanisms add an adaptive layer of control in the regulation of gene expression that allows an organism to adapt to a dynamic environment.

Epigenetic regulation increases the functional intricacy of deoxyribonucleic acid (DNA) by changing chromatin structure, nuclear organization as well as transcript stability.

To learn more about gene expression here

brainly.com/question/15159232

#SPJ4

4 0
1 year ago
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