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Umnica [9.8K]
3 years ago
5

A diseased cell is no longer able to produce proteins. Which cell structure is most likely malfunctioning?

Biology
2 answers:
valkas [14]3 years ago
5 0
The Ribosome is where protein synthesis happens, so if a diseased cell can't produce proteins, the Ribosome is malfunctioning
Zina [86]3 years ago
3 0
The ribosomes are most likely malfunctioning.
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Describe the complications that occur most frequently during calving, and recommend the best practices for assisting cows during
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Calving difficulty, technically called dystocia, is a major cause of death loss in cow-calf herds.

Explanation:

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6 0
3 years ago
DNA Polymerase helps copy a DNA molecule during the process of what?
PtichkaEL [24]
The DNA polymerases are enzymes that create DNA molecules by assembling nucleotides, the building blocks of DNA. These enzymes are essential to DNA replication and usually work in pairs to create two identical DNA strands from one original DNA molecule. During this process, DNA polymerase “reads” the existing DNA strands to create two new strands that match the existing ones.

Every time a cell divides, DNA polymerase is required to help duplicate the cell’s DNA, so that a copy of the original DNA molecule can be passed to each of the daughter cells. In this way, genetic information is transmitted from generation to generation.

Before replication can take place, an enzyme called helicase unwinds the DNA molecule from its tightly woven form. This opens up or “unzips” the double stranded DNA to give two single strands of DNA that can be used as templates for replication.

DNA polymerase adds new free nucleotides to the 3’ end of the newly-forming strand, elongating it in a 5’ to 3’ direction. However, DNA polymerase cannot begin the formation of this new chain on its own and can only add nucleotides to a pre-existing 3'-OH group. A primer is therefore needed, at which nucleotides can be added. Primers are usually composed of RNA and DNA bases and the first two bases are always RNA. These primers are made by another enzyme called primase.

Although the function of DNA polymerase is highly accurate, a mistake is made for about one in every billion base pairs copied. The DNA is therefore “proofread” by DNA polymerase after it has been copied so that misplaced base pairs can be corrected. This preserves the integrity of the original DNA strand that is passed onto the daughter cells.



A surface representation of human DNA polymerase β (Pol β), a central enzyme in the base excision repair (BER) pathway. Image Credit: niehs.nih.gov

Structure of DNA polymerase

The structure of DNA polymerase is highly conserved, meaning their catalytic subunits vary very little from one species to another, irrespective of how their domains are structured. This highly conserved structure usually indicates that the cellular functions they perform are crucial and irreplaceable and therefore require rigid maintenance to ensure their evolutionary advantage.

7 0
3 years ago
Heart on the run, keep your hand on a gun, cant trust anyone....<br> - Cover Me Up by Morgan Wallen
nevsk [136]

Answer:

its   "a heart on the run  keeps a hand on a gun  you can't trust anyone"

4 0
3 years ago
The construction of wind farms has affected the migratory patterns of some bird populations. Bird populations have been noted to
liubo4ka [24]
The correct answer is C. <span>a density-independent limiting factor

When bird populations sometimes decrease in areas due to wind farms, this occurrence is known as a density-independent limiting factor because it is not related so much to density.</span>
7 0
3 years ago
Read 2 more answers
The gene for hairline shape has two alleles: widow's peak (W) and straight hairline (w). What is the percent probability that on
Alexandra [31]

Answer:

Probability of having a child with genotype Ww is 50%.

Explanation:

This question involves a single gene coding for hairline shape in humans. The allele for widow's peak hairline (W) is dominant over the allele for straight hairline (w). This means that allele W will mask the phenotypic expression of allele w in a heterozygous state.

In a cross between a mother with genotype, Ww and father with genotype, ww, the following gametes will be produced by each parent:

Mother (Ww)- W and w

Father (ww)- w and w

Using these gametes in a punnet square (see attached image), four possible offsprings will be produced with genotypes: Ww, Ww, ww and ww.

Ww(2) : ww(2) or Ww(1) : ww(1)

Hence, 1 out of 2 children produced by the parents will have a genotype Ww, i.e. 1/2. Therefore, the percentage probability is 1/2 × 100= 50%.

5 0
3 years ago
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