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Lilit [14]
3 years ago
15

A bunch of amino acids attach together is called a

Biology
2 answers:
Yuliya22 [10]3 years ago
7 0

<span>A polypeptide is a single linear chain of many amino acids, held together by amide bonds. A protein consists of one or more polypeptides (more than about 50 amino acids long). An oligopeptide consists of only a few amino acids (between two and twenty).  </span>

<span />A polypeptide

Sergeeva-Olga [200]3 years ago
5 0
A peptide bond<span> is a chemical bond that joins amino acids together where the carboxyl group of one amino acid bonds with the amino group of another. This forms a dipeptide, which is simply a compound consisting of two amino acids. It requires the loss of water to form a bond, which is a process called a dehydration synthesis reaction.</span><span>
</span>
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Which response best explains why promoters for the same sigma subunit do not have identical sequences?
Natalija [7]
The correct response is,
the sequences within the promoter region at -10 and -35 are the most important for recognition by the sigma subunit.
Promoter region is the DNA sequence located upstream of the corresponding gene. Promoters for genes are essential as RNA polymerase recognizes the promoter region and binds to it forming the holoenzyme complex which can inititate transcription of the gene located downstream.
Sigma factor is the transcription factor found in bacteria, RNA polymerase has a subunit for the sigma factor, this factor only can recognise the sequences in the promoter region and bind to it thus initiating transcription. 

Promoters usually have 2 parts of conserved regions, -10 element and -35 elements. Both these regions have conserved sequences.
The sigma factor is capable of identifying these conserved sequences at these particular locations of the promoter and can bind to these sequences.
once the sigma factor binds to these regions, RNA polymerase too binds and forms a transcription initiation complex and then transcription of the downstream gene is initiated.

Therefore promoters need not have identical sequences for the sigma factor to bind, as long as the -10 and -35 regions have conserved sequences the sigma factor can bind and transcription initiation will be followed.  
5 0
3 years ago
Read 2 more answers
What is the overall structure of the DNA molecule?
natima [27]
The overall structure is said to be a double helix composed of nitrogenous bases and the sugar backbone. It is also double stranded too
6 0
3 years ago
Black footed ferrets are native to the great plains. which factor would decrease an area's carrying capacity for these ferrets?
egoroff_w [7]

Answer:

c

Explanation:

i think might be b but most likely c

7 0
3 years ago
3. What are some scientific explanations for the history of life on Earth?
KATRIN_1 [288]

Answer:

Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects

7 0
3 years ago
What is the potential energy of a 10kg object sitting on a 2.5m high cliff
Sloan [31]

Answer:

245.1663 Joules

Explanation:

Use the potential energy formula which is U=mgh

Where m=mass in Kg

g=gravitational acceleration: 9.80665 m/s^2

and h=height in meters

5 0
2 years ago
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