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Phoenix [80]
3 years ago
13

Which one of the following describes an epigenetic modification? A point mutation in the coding sequence of a gene. A deletion i

n the regulatory region of a gene. A nonsense mutation in the coding region of a gene. A methyl group bound to DNA inhibits transcription of a gene.
Biology
2 answers:
madreJ [45]3 years ago
8 0
<h2>Epigenetic modification </h2>

Explanation:

A methyl group bound to DNA inhibits transcription of a gene describes an epigenetic modification

Epigenetic modifications include: histone modifications and methylation

Methylation is the main cause of gene silencing for example methylation at lysine residue of histone protein, H4 leads to gene repression

Small silencing RNA molecules are of two types: micro RNA (miRNA) and small interfering RNA (siRNA)

miRNA directs degradation of target mRNA when makes perfect complementary while suppress mRNA translation when makes partial or imperfect complementary

siRNA primarily mediates degradation of target RNA

vovangra [49]3 years ago
6 0

Answer:

<h2>A methyl group bound to DNA molecule inhibits transcription of a gene. </h2>

Explanation:

1. Epigenetic modification: Those changes which do not involve the alterations in the sequence of DNA, means there in no change in DNA sequence, like addition, deletion or such other type of changes in the sequence of nucleotide do not occur

2. Epigenetic describes any  such type of modification of chromosome( which do not change the sequence of nucleotide), especially histone modifications, and these changes may be heritable or not  or associated with a phenotype.

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Who is studying animals in the wild considered to be somewhat experimentally out of control
KIM [24]

Studying animals in the wild is considered somewhat experimentally out of control because of several reasons.  

<u>Explanation:</u>

Study of wild animals can be done using several methods but none will be as effective as studying captivated animals. Using stationary cameras is a method to observe animals in the wild. The stationary nature of the camera makes it necessary for the animals to appear within the field of the camera.

This is difficult in places of low animal density. In addition to that placing camera at a longer distance to watch a larger area decreases the resolution of the images. When it comes to shallow water systems, the field imagery used to track the aquatic species frequently gets affected by issues like sun flicker.  

Unmanned aerial vehicles can also be used to track and study animals in the wild. This is good alternative but filming through dense canopies or turbid water is a limitation. Bio loggers can also be used for animal tracking but it is limited by weight since it has to be carried by animals.  

5 0
3 years ago
The image below shows one muscle cell. Please choose the name of the structure that is labeled A.
Bond [772]

The name of the structure labeled as A is 'myosin'. Moreover, the name of the structure labeled as B is 'actin'.

A sarcomere is the basic unit of muscle contraction. This unit is defined as the region between two Z-lines.

Band A is a central band composed of the thick filaments of myosin.

Moreover, the sarcomere also has two halves of a band known as I-band, which consists of thin filaments of actin.

Muscle contraction is caused by the interaction between actin and myosin protein filaments in the sarcomeres.

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brainly.com/question/7146598?referrer=searchResults

6 0
3 years ago
Atoms with a low electronegativity, like calcium, might bond with ____________.
TiliK225 [7]

The answer is A.The calcium atom must bond with an atom of high electronegativity (like fluorine) because the higher electronegativity atom will bully the low electronegativity atom and take away its electrons.

These are the choices:

A. an atom with a high electronegativity, like fluorine

B. another atom with a low electronegativity, like lithium

C. another atom that would like to share electrons

D. no other atoms because it's too weak to bond with anything


7 0
3 years ago
Read 2 more answers
List and describe one example of a useful application of cloning.
mojhsa [17]
Reproductive Cloning. Deliberate production of genetically identical individuals 
6 0
4 years ago
Hemophilia is a disease that causes uncontrollable bleeding. If a father has it, all of his daughters will be carriers of the di
Ipatiy [6.2K]

Answer:

<em>Yes, the following description is true.</em>

Explanation:

Hemophilia is a sex-linked recessive disorder. This means that only one allele recessive allele for the trait in males will cause the disease to occur in males. However, for females, there should be two recessive alleles present for the gene for the trait to occur. A female carrying one recessive allele for the trait will be a carrier.

If a father is hemophiliac, this will mean that all the daughters will be carriers for the disease as they will have one of the allele for the trait from the father. On the other hand, about half of the sons will have the disease if they get the recessive allele from the father for the trait.

7 0
3 years ago
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