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3 years ago

DNA polymerase I, from E. coli, has three different catalytic sites. Which of the following is NOT one of them?

Biology

1 answer:

Leokris [45]3 years ago

5 0

Answer:

RNA-dependent RNA polymerase.

Explanation:

DNA polymerase I is present in E.coli that are responsible for the prokaryotic DNA replication. The DNA polymerase I was discovered by Arthur Kornberg. This enzyme is coded by the gene polA.

DNA polymerase I has the activites of DNA-dependent RNA polymerase, DNA-dependent DNA polymerase and RNA-dependent DNA polymerase. The RNA-dependent RNA polymerase is generally present in the reverse transcriptase in case of viruses only. RNA-dependent RNA polymerase catalytic site is not present in DNA polymerase I.

Thus, the correct answer is option (1).

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In examining a cell using the electron microscope, you see a structure that is composed of two membranes, contains numerous pore

Effectus [21]

<h2>Nuclear Envelope</h2>

Explanation:

The endomembrane system includes the nuclear envelope, the endoplasmic reticulum, Golgi mechanical assembly, lysosomes, vesicles, just as the plasma layer
These cell parts cooperate to alter, bundle, tag, and transport layer lipids and proteins
The nuclear envelope is a double membrane, implying that there are two lipid bilayers
The nuclear lamina, a netlike cluster of protein filaments, associates the layers of the nuclear envelope

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3 years ago

In late adulthood, Mr. Klondike has become increasingly likely to make a socially impolite remarks about other people's appearan

xz_007 [3.2K]

Answer:

frontal

Explanation:

In a mammalian brain, there are four major lobes that are present and one of them is the frontal lobe.
The frontal lobe is mainly rich in dopaminergic neurons and thus, it is mainly concerned with functions such as memory, reward, motivation, planning, attention, etc.
The process of break down of tissues and cell death in the tissues is referred to as atrophy and since the frontal lobe is associated with the functions as mentioned above its atrophy would lead to a slow decline in these functions.
Since Mr. Klondlike behavior is changing his blunt comments are most likely a result of atrophy of the frontal lobe.

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2 years ago

The biodiversity and distribution of penguin species in the Antarctic Peninsula are changing as sea ice disappears. This is most

Vilka [71]

I believe the correct answer from the choices listed above is the first option. The biodiversity and distribution of penguin species in the Antarctic Peninsula are changing as sea ice disappears. This is caused by the climate change which causes glaciers to melt down rising the sea levels. Hope this answers the question. Have a nice day.

3 0

3 years ago

Read 2 more answers

What is the plate boundary at which one plate is pushed beneath another called?

Tasya [4]

Answer:

Explanation:

how do u do this?

8 0

3 years ago

Microarrays allow for a comparison of expression of different genes under different growth conditions. the analysis of global ge

Lady_Fox [76]

Question

Microarrays allow for

•a comparison of expression of different genes under different growth conditions.

• the analysis of global gene expression.

•the hybridization of cDNA (converted from mRNA with DNA affixed to a solid-state support.

• all of the above.

Answer:

• all of the above.

Explanation:

Microarray involves the collection and isolation of genetic samples (DNA) from a sample or tissue.

Microarray is composed of a large number of DNA material that is arrange sequentially for easy identification and use.

Microarray is used to compare the expressions of various types of genes that are growing under different conditions. It can also be used for analysis of genes globally.

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3 years ago