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joja [24]
3 years ago
15

Someone plz help me

Biology
2 answers:
erik [133]3 years ago
7 0

Answer:

A

Explanation:

olchik [2.2K]3 years ago
7 0
It’s A


I just took the test
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Where do sensory nerve cells, parasympathetic ganglia, and symphathetic postganglionic fibers found?
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Answer:

These are found in the <em>submucosal</em><em> </em><em>plexus</em>

Explanation:

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3 0
3 years ago
Each of the proteins involved in DNA replication plays an important role. If one of these proteins was not functional it would h
Masteriza [31]

Answer:

Explanation:

1. Topoisomerase is an enzyme helps in over winding Or underwinding of DNA during replication. Helps in the topological correction. So non-functional topoisomerase leads to tangled DNA and prevents replication..

2. Primases are the enzymes helps in the synthesis of short RNA sequences used as primers in replication. Non functional primase leads to no primer synthesis.  

3. DNA Polymerase is an enzyme helps in the addition of new nucleotide to the growing strand in replication. Non functional DNA polymerase prevents the strand growing as no new nucleotides were added.  

4. Helicases are the enzymes helps in the separation of double strands into single and helps in each strand to be copied. Non functional helicase leads to prevention of unwinding of strands and replication inhibition.  

5. ligase is an enzyme that joins nicks(small gaps) in the DNA strand by creating ester bond. Non functional ligase leads to unjointed gaps of lagging strand.  

6. Single strand binding proteins(SSB's) are the small proteins that binds to the single strands of DNA and holds them in a place not to get together while replicating. Non functional SSB's leads to parental strands come back together and prevents replication.

4 0
4 years ago
Which of the following statements about plant cell walls is true?
Leya [2.2K]

Answer:

<h2>A </h2>

Explanation:

1. The cell is present in some type of cells. It is found in plants and bacteria and some others. It is present or found outside the plasma membrane.

2. The functions of cell wall are that it provides tensile strength and protection to the cell against many type of stress. It also plays very important role in many others protections for the cell. There are two layer, named as primary cell wall and secondary cell wall.

3. Composition of Plant cell walls is that they are primarily made of cellulose. Cellulose fibers are linear long polymers of around  100 molecules  of glucose. These fibers cluster into bundles, known as  or called microfibrils. In plants the microtubule cytoskeleton are present, and there function is that they directs the orientation of cell wall as  in which orientation cellulose is deposited in the cell wall.

7 0
3 years ago
All strains of human papillomavirus (HPV) are capable of integrating their double-stranded DNA viral genome into host basal cell
Novosadov [1.4K]

Answer:

Oncogenes.

Explanation:

Cancer is the harmful disease that causes several death in the world. Cancer occur due to the mutation in the genes that are responsible for the regulation of apoptosis  and cell divisions.

The virus are also oncogenic in nature and can cause several different type of cancer. The human papilloma virus can be transmitted from the skin contact. The virus cause cervical cancer and genital warts. The integration of this virus into host genome increases the expression of viral oncogenes in the host DNA.

Thus, the answer is oncogenes.

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3 years ago
Jeremy is observing a cross-section of a corn stem under the microscope. He observes that there is no vascular cambium present i
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This is because it is a monocot and monocots do not have a vascular cambium in their stems.
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3 years ago
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