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anygoal [31]
3 years ago
14

Explain- Why are tobacco,alcohol and ultraviolet radiation listed as carcinogens in the table?

Biology
1 answer:
Sati [7]3 years ago
7 0
They can cause changes in a certain cell that can cause the growth or death in a cell.
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A nonsense mutation in a gene _____. A nonsense mutation in a gene _____. has no effect on the amino acid sequence of the encode
Delicious77 [7]

Answer:

introduces a premature stop codon into the mRNA

Explanation:

A nonsense mutation is a mutation in which an amino acid–specifying codon is changed into a termination codon or stop codon. A stop codon is a codon that does not code for any amino acid and serves to terminate the process of protein synthesis as ribosomes encounter it on the mRNA.

There are three stop codons: UAA, UAG, UGA. A nonsense mutation introduces a stop codon in place of an amino acid encoding codon. It results in the formation of truncated protein which is shorter than the normal protein. Truncated proteins are mostly nonfunctional.

7 0
3 years ago
Fructose is? also known as dextrose. the sweetest of the sugars. abundant in whole grains. a starch. known as milk sugar.
Elina [12.6K]

Dextrose and fructose are both types of sugar. the sugar with the best flavor. plenty of whole grains. the starch. called milk sugar.

It is also found naturally in other plant foods such as honey, sugar beets, sugar cane, and vegetables.  Fructose is the  sweetest naturally occurring carbohydrate, 1.2 to 1.8 times more  sweeter than sucrose (table sugar). is the sweetness of Fructose metabolism does not require insulin and has little effect on blood sugar levels.  There are many different types of sugar, some  more common than others. Fructose, like glucose, is a type of sugar known as a simple sugar or "simple sugar". Monosaccharides can be combined to form disaccharides, the most common of which is sucrose, or "sugar." Sucrose is made up of 50% fructose and 50% glucose. Fructose and glucose have the same chemical formula (C6H12O6), but due to their different molecular structures,  fructose is 1.2 to 1.8 times sweeter than sucrose. In fact, fructose is the sweetest natural carbohydrate.

In nature, fructose is most commonly found as a component of sucrose. Fructose is also found in plants as a simple sugar, but that doesn't mean other sugars don't exist.

Know more about Fructose:

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4 0
1 year ago
Infection occurs when the host is exposed to pathogens. what type of pathogen uses the cell's metabolism, and replicates itself
vladimir1956 [14]

Answer: Infection occurs when the host is exposed to pathogens. virus uses the cell's metabolism, and replicates itself while destroying the cell or changing the cell's genetic makeup.

Explanation:

  • A virus is a miniscule pocket of protein that contains genetic material.
  • Viruses pose a considerable challenge to the body’s immune system because they hide inside cells.
  • This makes it difficult for antibodies to reach them. Some special immune system cells, called T-lymphocytes, can recognise and kill cells containing viruses, since the surface of infected cells is changed when the virus begins to multiply.
  • Many viruses, when released from infected cells, will be effectively knocked out by antibodies that have been produced in response to infection or previous immunisation.
  • Antibiotics are useless against viral infections.  So antiviral drugs work differently to antibiotics, by interfering with the viral enzymes instead.

Hence virus are the pathogen that use the cell's metabolism. And replicate itself while destroying the cell or changing the cell's genetic makeup. viruses are so simple that they use their host cells to perform their activities for them

Learn more about virues :

brainly.com/question/17173059

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6 0
1 year ago
What would happen if you flew into jupiter?
aleksley [76]
A major problem in sending space probes to Jupiter is that the planet has no solid surface on which to land, as there is a smooth transition between the planet's atmosphere and its fluid interior. Any probes descending into the atmosphere are eventually crushed by the immense pressures within Jupiter
4 0
3 years ago
The percentage of germination of lettuce seeds exposed to far-red light, then blue light, and then red light compared to lettuce
Romashka-Z-Leto [24]

Answer:

<u>50%</u>

Explanation:

<em>Since</em> it was not a case of a Lettuce seed exposed first to <em>red light</em> and then to <em>far-red light</em> which will very likely not germinate because Pr (chromoprotein inactive form) absorbs red light efficiently, the light absorbed will convert a high proportion of the molecules to the Pfr (chromoprotein active form), thereby inducing germination. So there is a 50/50 percentage chance of of germination.

3 0
3 years ago
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