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Kazeer [188]
3 years ago
13

In what way can DNA segments be changed such that genes are altered or mutated?

Biology
2 answers:
sashaice [31]3 years ago
5 0
<h3><u>Answer;</u></h3>

<em>All the three are correct </em>

  • New DNA segments can be inserted.
  • New DNA segments can be substituted.
  • DNA segments can be deleted.
<h3><u>Explanation</u>;</h3>
  • <em><u>DNA are important molecules that carry hereditary information in all organisms. The nucleotide sequences or the genes are subject to change as a result of mutations.</u></em>
  • <em><u>Mutations are spontaneous random changes that occur in the genetic make up of an organisms or the DNA sequences of an organism.</u></em>
  • <em><u>When mutations occur they can cause insertion of new DNA segments, substitution of DNA sequences with new ones, and also deletion of some sequences of DNA.</u></em>
  • <em><u>Substitutions, deletions and insertion mutations are types of mutations that affect cells at gene level.  </u></em>
uranmaximum [27]3 years ago
3 0
That would be I, II, and III 

I and II will cause a frame shift mutations. 
II can cause horrible effects if the substituted base codes for a stop codon. 
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Alchen [17]

Answer:

C. Removing this step decreases the amount of carbon in the air: This is correct, removing factories would decrease the emission of greenhouse gases, thus decreasing CO2 in the atmosphere.

Explanation:

When we look at the picture we can see that the line that goes from G to C, goes from a factory to the atmosphere. As we know factories release a great number of elements into the atmosphere being one of them, carbon dioxide. Therefore taking into consideration we can proceed to analyze the following statements.

A. Removing this step prevents photosynthesis in the next step: This is not true industry increases carbon dioxide in the atmosphere, even if they don't exist there is enough CO2 for plants to perform photosynthesis.

B.Removing this step increases the amount of carbon in the soil: This is not true as factories release carbon dioxide to the atmosphere, not the soil.

C. Removing this step decreases the amount of carbon in the air: This is correct, removing factories would decrease the emission of greenhouse gases, thus decreasing CO2 in the atmosphere.

D. Removing this step increases carbon storage in plants: This is incorrect the carbon storage in plants is cording to their necessities independently of the abundance in CO2, in the atmosphere.

8 0
2 years ago
The role of rRNA in gene expression is to?
Verizon [17]

Answer:

The correct answer is rRNA plays an important role during translation (protein synthesis) of mRNA.

Explanation:

Ribosomal RNA or rRNA are the RNA molecules which build up the site for protein synthesis known as ribosomes.

Ribosome synthesis takes place in nucleolus where two types of rRNA molecules associates with proteins, one in large subunit and one in the small subunit to form ribosomes.

These ribosomes physically moves along an mRNA molecule and catalyze the assembly of amino acids where rRNA molecules performs the catalytic steps of protein synthesis that is stitches amino acids together and makes up proteins.

Thus,  rRNA plays an important role during translation (protein synthesis) of mRNA.

4 0
3 years ago
Ceruminous glands are ________. Ceruminous glands are ________. saliva glands found at the base of the tongue modified taste bud
kogti [31]

Answer:

Modified apocrine sweat glands

Explanation:

The ceruminous glands are similar to sebaceous glands, belonging to the group of sweat glands. These glands secrete a sticky material, the ear wax, that protects the thin skin lining the ear canal.

As soon as a dust, dirt or an insect enters the ear canal at the beginning of the ear wax, the wax retains, wraps and pushes it outside the ear canal.

This secretion is lubricating as well as acidic, which helps to kill potentially harmful bacteria and fungi in the ears.

5 0
3 years ago
What are mutators and how are they used?
Naya [18.7K]

In computer science, a mutator method is a method used to control changes to a variable. They are also widely known as setter methods. Often a setter is accompanied by a getter (also known as an accessor), which returns the value of the private member variable
4 0
3 years ago
Several groups of protists have variable modes of nutrition: Some species are photoautotrophs, whereas close relatives are heter
Radda [10]

Answer:

The endosymbiotic theory

Explanation:

Protists are the multicellular organisms which possess characteristics of both the prokaryotes and eukaryotes.

The protist can derive nutrition by either heterotrophic mode or photoautotrophic mode. This variation could exist within the same genus and same species.

This variation could be explained with the endosymbiotic origin of the organisms as some species could engulf the photosynthetic bacteria whereas some could have engulfed the chemosynthetic bacteria.

This can be observed in the green and red algae which depend on a different mode of nutrition belonging to the same group.

Thus, the endosymbiotic theory is correct.

4 0
3 years ago
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