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erma4kov [3.2K]
3 years ago
15

Please Help _ Biology

Biology
2 answers:
olga_2 [115]3 years ago
4 0
Hi

The answer is : C
Transcription Factors
Marrrta [24]3 years ago
4 0

Answer:

C (Transcription factors)

Explanation:

Gene regulation refers to the mechanisms that act to induce or repress the expression of a gene. These include structural and chemical changes to the genetic material, binding of proteins to specific DNA elements to regulate transcription. Gene regulation controls the rate and manner of gene expression.

Transcription factors are proteins that play an important role in regulating the transcription of genes by binding to specific regulatory nucleotide sequences. They help turn specific genes "on or off" by binding to nearby DNA. Transcription makes it easy or hard for RNA polymerase (an enzyme that synthesizes a RNA molecule from DNA template) to bind to the promoter of a gene.

Transcription factors that boost gene expression are called ACTIVATORS while those that decrease it are called REPRESSORS.

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Most deer mouse populations inhabit regions with dark soils. These deer mice have dark brown fur. Populations of deer mice found
mixas84 [53]

Answer:

Tan fur helps the mice protect themselves from predators

Explanation:

The entrenchment of this phenotype in the population is powered by natural selection pressures. The mice with fur color that enable them to camouflage with their environment are predated less than mice with other fur colors. These tan mice are therefore more likely to survive and pass their genes to the next generation. Through successive generations, the allelic frequency for the tan fur color increases until it is the dominant allele in the population.

7 0
4 years ago
Meat is not a good source of protein because it does not provide the body with all the essential amino acids.
tankabanditka [31]

Answer: False.

Meat is a good source of protein. There are nine essential amino acids which are required under special conditions like illness.

These are-  Histidine, Leucine, Isoleucine, Valine, Threonine, Methionine, Lysine, Phenylalanine and Tryptophan. They cannot be synthesized by the body and therefore need to be taken from external protein sources.

Since meat contains all the essential amino acids, therefore it is considered as a good source of protein. Hence, the given statement is false.

3 0
3 years ago
Read 2 more answers
What is the relationship between a scientific theory and a scientific law
vfiekz [6]
A law is something that can be measured or observed to be true. A theory, is something that can be assumed to be true based on the best available knowledge. 
5 0
3 years ago
A dog has a mass of 12 kg. what is its weight
Doss [256]
Using W=mg

12*10 m/sec squared
10 m/sec squared = 100
100*12
=
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4 0
3 years ago
Breastfed infants typically are resistant to disease because of ________.
DochEvi [55]

Answer:

Passice immunity

Explanation:

Breast milk, produced by female mammals (including humans), besides being rich in fat and protein is full of IgA. IgA is the immunoglobulin (immune system signal proteins) that is present in body secretions, such as milk.

The baby that is fed from the mother's breast ingests these defense proteins that allow it to tolerate different pathogens and toxins.  

It is considered passive immunity, as it does not generate memory and depends on a continuous dose to maintain defense levels.

6 0
3 years ago
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