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solong [7]
4 years ago
9

Benzopyrene is a compound found in cigarettes that binds to the base guanine in DNA. This distorts the DNA double helix and caus

es changes in DNA sequence. Based on this information, benzopyrene is a
Mutagen
Biology
1 answer:
dlinn [17]4 years ago
6 0

Answer:

Explanation:

When a substance has the  capacity to disrupts the genetic compositions (DNA) of the  organisms, to the extent that it makes the  particular organism genetic materials prone to genetic mutation,( random changes in the genetic composition) such group of substances are called Mutagens.

ionizing radiation,radioactive decay are  some examples of  of physical mutagens, while biological mutagens examples include viruses and bacterial. Chemical mutagens are Benzene compounds,bromine,aromatic amines,sodium Azide.

They exerts their negative effects

by disrupting gene expression sequence of transcription, translation, or changed the nucleotides  sequence of the DNA leading to  deletion, addition, subtraction of genetic bases.Some may make chromosomes to be unstable, disrupting the structure

 Although some mutagens can cause cancer, that is they are mutagens. not all mutagens  carcinogenic.This is because the Mutagenic effects depends on the metabolites present in the cells of the organisms.

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Based on the anatomical and physiological differences between an infant and an​ adult, which finding would suggest respiratory d
frosja888 [35]

Answer: Excessive movements of the walls of the  abdomen

Basically babies belly breathe, that is they undergo abdominal pattern of respiration( instead of the abdomino- thoracic pattern in  adult), through their abdomen.

<u>This is because,  their thoracic walls are not fully functional to undergo  the normal adult mechanisms  of breathing</u>.

<u>The ribs are short in length due to incomplete ossification. They curve out wards, at low angle, their sternum, is shaped horizontally.</u>

These features reduce the activities   of the inter coastal muscles and the thoracic cage  in the mechanism of  infants breathing,compare to the long ribs, obliquely shaped rib cage,  with lower  sternum  of  adult which  permit the  abdominal-thoracic  breathing pattern.

Therefore ,when the diaphragm distends during breathing ,its movement pushes the organs of the abdomen down; because infants have rapid respiratory  rates, the distends created  rapid  expansion and contraction of the walls of the abdomen to gain enough abdominal pressure.

This together with the movement of  organs of the abdomen   from  the  pathways of diaphragm  created the  excessive  movements of the abdominal walls. This rapid abdominal wall movements creates discomfort and distress for the infant during this mechanisms.

Explanation:

7 0
4 years ago
What is meant by photosynthesis​
levacccp [35]

Answer:

Photosynthesis is a physio-chemical process by which green plants use light energy to drive the synthesis of organic compounds. It is an enzyme regulated anabolic process.

Explanation:

8 0
3 years ago
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Which substance on the plasma membrane helps identify chemical signals from outside the cell?
nikdorinn [45]

Answer:

The correct answer is carbohydrate chain.

Explanation:

Plasma membrane contain three types of protein  a peripheral protein b transmembrane protein and c GPI anchored protein.

    Some membrane protein basically peripheral proteins contain oligosaccharide chain arranged towards the extracellular region of the plasma  membrane with respect to the surface of that glycoprotein.

   The oligosaccharide chain of glycoprotein play an important role in to identify signals from outside the cell.These signals may include the entry of virus particles inside our body,protein targeting etc.

8 0
4 years ago
Resources from the ocean are found in many regions, but the majority of all resources are located in which region?
alexandr1967 [171]
Lots of resources are located in the United States. Such as oil, gold, silver, iron, and much more.
3 0
3 years ago
What is the definition of ecology?
Maru [420]

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Ecology is the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.

4 0
3 years ago
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