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arlik [135]
3 years ago
8

A concentration gradient is ________.

Biology
1 answer:
Lorico [155]3 years ago
6 0

Answer: The process of particles, which are sometimes called solutes, moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles. The areas are typically separated by a membrane.

THE ANSWER IS A!!!

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Which of the following describes the correct stepwise assembly (in vitro) of the eukaryotic RNA polymerase II preinitiation comp
PilotLPTM [1.2K]

Answer: (TFIID) TBP-> TFIIB IIA--> TFIIF RNA POL II

Explanation:

Remember that in eukaryotic organisms, transcription and processing are coupled processes. There are 3 different types of Rna pol. In the case of RNA pol II transcribes genes that encode proteins (mRNA synthesis). Transcription factors are involved, for example: TFIID, TBPs, TAF (recognizes TATA promoter center, regulatory functions), TFIIA (stabilizes TBP union, antirepressant function), TFIIB (RNA Pol II starting point selection).

7 0
3 years ago
A frameshift mutation that occurs very early in a protein sequence would have what effect on the protein's structure? A. The pri
AlekseyPX

Answer:

C. Primary, secondary, and tertiary structures would be altered

Explanation:

Frameshift mutations refer to the mutations that change the reading frame of the gene. Frameshift mutations are mostly caused by insertion or deletion of nucleotide since addition or loss of nucleotide alters all the codons present downstream of the point of the mutation site. If frameshift mutation occurs at the beginning of the protein sequence, all the downstream amino acids would be altered.

The changed amino acid sequence would alter the primary structure of the protein. Since the secondary and tertiary structure of proteins is determined by interactions between the R groups of amino acids, their polarity, charge, etc., the altered amino acid sequence would also alter secondary, and tertiary of the protein.

3 0
3 years ago
In order for this code to represent a piece of DNA, which base must be replaced by thymine?
HACTEHA [7]
I guess you forgot to add the picture or so.
Based on the Complementarity of the 4 nucleotides, The thymine must always be placed in  front of the Adenine, and the Cytosine must always be placed in front of the Guanine.
Any change in this rule causes the deformation of the DNA, and can sometimes cause fatal diseases like the melanoma (skin cancer) etc...

Hope this Helps! :)
7 0
4 years ago
alpha helix and beta sheet secondary structure is located mainly in the interior of folded proteins whereas irregular loops occu
emmainna [20.7K]

Answer:

of folded proteins

Explanation:

In Secondary structures; the irregular loops seems to be positioned on the outside of folded proteins while the Alpha and beta sheets is categorically positioned at the centre or interior of the protein.

The loops are positioned on the outside of folded proteins in order for the peptide bonds to be open to form H bonds with water.

8 0
3 years ago
State four cells that made up xylem<br>​
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The xylem consists of tracheary elements, xylem parenchyma cells, and xylem fiber cells.

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3 years ago
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