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Delicious77 [7]
2 years ago
7

What is the first thing to occur in dna replication?

Biology
1 answer:
12345 [234]2 years ago
4 0
The first thing is that the enzyme, DNA helicase
breaks the hydrogen bonds to unzip the double strand of dna for replication to take place
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Draw a DNA molecule that has five randomly spaced restriction sites for a spedific palindrome. How many fragments would be produ
Bond [772]

Answer:

Figures attatched

Explanation:

1. Restriction enzymes cut the DNA in specific places of a specific sequence. Each restriction enzyme has different sequences of recognition.

2. Palindromic sequences are sequences that can be read the same in both senses (3' and 5'), for that reason restriction enzymes can cut both DNA strands

Now, for the first image: if a molecule has 5 restriction sites that are known for a single restriction enzyme, the enzyme will cut the DNA 5 times. If you see the image, the number of fragments is the number of restriction sites +1. In this case, it is 5+1=6 DNA fragments.

In the case of two different palindromic sequences, two different restriction enzymes recognize different sequence. If just one enzyme is present, the only cutting site will be the one that has the palindromic sequence recognizable. So, the number of fragments will be 1+1=2 DNA fragments (figure 2)

7 0
3 years ago
These have monomers known as nucleotides.
Sindrei [870]
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4 0
3 years ago
Which describes the paleoanthropology practice of walking the landscape looking for fossils on the surface?
enot [183]

Answer:

The correct answer is : surveying.

Explanation:

Paleo-anthropology is the study of the extinct primates, it is a sub branch of anthropology. It is focused on the human evolution and rise of the sub type of family of the other human or hominids.

Surveying is the one of paleoanthropoolgy practices that involves the finding the fossils of hominids on the surface of all around the globe by walking to compare it and study the evolution of human family.

Thus, the correct answer is- surveying.

3 0
3 years ago
An infection begins when a pathogen or parasite begins to cause symptoms of a disease.
MAVERICK [17]
Is this a true or false question?
5 0
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Which of the following describes the relationship between population and species?
djverab [1.8K]

Answer:

A population consists of all individuals of all species in one area

3 0
3 years ago
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