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Mrrafil [7]
3 years ago
15

A new DNA strand elongates only in the 5' to 3' direction because _____.

Biology
1 answer:
goldenfox [79]3 years ago
6 0

Answer:

d. DNA polymerase begins adding nucleotides at the 5' end of the template

Explanation:

Polymerase DNA always works in one direction, synthesizing the new 5' to 3' oriented chains and adding nucleotides to the 3' end of a new synthesis chain by forming phosphodiester bonds between the phosphate of a nucleotide and the sugar of the anterior nucleotide.  

Because DNA polymerase only acts in a 5' to 3' direction, replication along a chain, the leading chain, occurs continuously. The synthesis of the opposite chain, the delayed chain, occurs discontinuously because the DNA polymerase must wait for the replication fork to open. Over the delayed chain, short segments of DNA called Okazaki fragments (named after Reiji and Tsuneko Okazaki, the scientists who discovered these fragments) are synthesized as polymerase DNA works out of the replication fork. Ligase DNA catalyzes the covalent bonds between Okazaki fragments in the delayed chain to ensure there are no gaps in the phosphodiester skeleton. Finally, the first ones are removed and these gaps are filled by the DNA polymerase.

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6 0
3 years ago
Can anyone help me with this?
Licemer1 [7]

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5 0
3 years ago
Natural resources are not required for all energy producing technology. Please select the best answer from the choices provided
laila [671]
<h2>Answer:</h2>

<u>The statement is</u><u> False</u>

<h2>Explanation:</h2>

Energy production needs a source. These sources may be renewable or non renewable but in both cases they are present naturally in the universe and we cannot make anything without using natural resources. For example if we use nuclear energy we need radioactive minerals. Similarly water, air, solar energy, coal, fossil fuels, natural gas or whatever source we take, they are all present in nature already so natural resources are required for all energy producing technology whatever the industry we take.

4 0
3 years ago
Read 2 more answers
Ionization energy is the amount of energy necessary to _____.
Maslowich
I think ionization energy is the energy required to remove an electron from a neutral atom. It is the amount of energy that is required to remove the most loosely bound electron, the valence electron, of an isolated gaseous atom to form a cation. Atoms and molecules have this measurement, which refer to the energy it takes for all atoms in one mole of a substance to each lose one electron.
5 0
3 years ago
Two different organisms were studied in a carrying capacity study. One was a paramecium population that grew in a flask in a lab
Gre4nikov [31]

Answer:

Paramecium- 0 days/ 50 paramecium

5 days/400 paramecium

10 days/ 900 paramecium

15 days/ 860 paramecium

Bear- 0 days/ 2 bears

20 years/ 26 bears

40 years/ 230 bears

60 years/ 250 bears

80 years/ 248 bears

100 years/ 252 bears

Explanation:

The population of the paramecium will keep on increasing until an equilibrium is reached. The resources will become limited and hence, the paramecium will start competition for the limited resources. As a result, the population of the paramecium will decline rapidly after equilibrium.

The growth rate of bear is very less as compared to that of paramecium growth rate. Along with the growth rate, there are other factors which will be responsible for its numbers such as resources, hunters etc. Also, it uses sexual method of reproduction hence the growth rate will not be like the paramecium growth rate.

6 0
3 years ago
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