Which statement best explains how two identical copies of a very large molecule can be made during DNA replication?

Biology

2 answers:

Bas_tet [7]3 years ago

6 0

Answer: B. DNA polymerase checks for errors in base pairing as it helps new DNA strands form.

Explanation: DNA polymerase is an enzyme that catalyzes the synthesis of a new DNA strand from a DNA template. This process is known as replication. During replication, DNA polymerase rejects incorrect bases before the phosphodiester bond is formed because it has a 3' -> 5' exonuclease activity that double checks every nucleotide that is added to the growing strand. This check allows the enzyme to remove a newly added mismatched base pair.

choli [55]3 years ago

5 0

Answer:

Explanation:

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Horses went extinct in North America and did not return until they were ferried in boats by European settlers (no land mammal ca

lys-0071 [83]

Answer:

sweepstake route

Explanation:

From the view of the horses, the ocean barrier would be seen as a sweepstake route.

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If the egg cell of animal has 25 chromosomes,how many chromosomes would be in a heart cell?

diamong [38]

Answer:

Explanation:

egg cells and sperm cells contain half of the chromosomes of a regular cell in an organism, so the number of chromosomes in a heart cell must be double of the chromosomes in a egg cell.

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3 years ago

Suppose you have monohybrid flowers in your garden and find that they produce black seeds to brown seeds in the ratio of 3:1. If

Dvinal [7]

Hybrid = having one recessive and one dominant allele
This means that all of the flowers must have the genotype Bb.
Knowing this, let's make a Punnet Square.

$\begin{tabular}{ l c } & B \ \ \ \ b\\ B & \boxed{BB}\boxed{Bb} \\ b & \boxed{Bb\ }\boxed{\ bb} \\ \end{tabular}$

As you can see, 3 of these are going to have the dominant trait and 1 is going to have the recessive trait. This corresponds to our 3:1 in our question, meaning that the black seeds must be dominant and the brown ones recessive.

Because they are dominant, the genotype for black seeds could be BB or Bb.

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