1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Papessa [141]
2 years ago
11

Before DNA replication can occur the double stranded DNA must first

Biology
1 answer:
Taya2010 [7]2 years ago
4 0

Answer/Explanation:

First, initiator protein unwinds a short stretch of the DNA double helix. <u>The length of the DNA double helix about to be copied must be unwound. </u> In addition, the two strands must be separated, much like the two sides of a zipper, by breaking the weak hydrogen bonds that link the paired bases.   Once the DNA strands have been unwound, they must be held apart to expose the bases so that new nucleotide partners can hydrogen-bond to them. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.

You might be interested in
Does voltage from deep brain stimulation damage brain tissue
Masja [62]
No. Deep Brain Stimulation blocks the defective electrical signals that can cause tremors and more movement symptoms.
3 0
3 years ago
Please help me!!!! 40 points
Andreas93 [3]

Answer:

A. aneuploidy; trisomic

Explanation:

Aneuploidy means having more numbers of chromosomes than usual while polyploidy means having an abnormal number of chromosome sets. Down syndrome is a trisomy on chromosome 21 meaning there are 3 chromosomes for chromosome set 21.

7 0
3 years ago
Read 2 more answers
Which helps prevent errors in DNA replication?
nataly862011 [7]

Answer is: each base can attch to only one other type of base

4 0
4 years ago
Read 2 more answers
Do pollen grains have the same number of chromosomes as a regular plant cell?
finlep [7]

The pollen grain is actually the male gametophyte generation of seed plants. Inside the anther, pollen mother cells divide by meiosis to form pollen grains whose nuclei contain half the number of chromosomes characteristic of the parent plant. 

(hope that helped answer the question)

8 0
3 years ago
What is selective dreeding?
tino4ka555 [31]
I believe you meant 'selective breeding'.
Selecitve Breeding is when say a dog breeder, chooses two prospective parents in hopes of achieveing a superior offspring or offspring with desired traits.
4 0
3 years ago
Other questions:
  • A Biome is made up of a combination of living and non-living things. The living things you find will vary greatly based on clima
    12·1 answer
  • is fever a specific or nonspecific immune response? I need help! If you can provide an explanation, that would be great. If you
    9·1 answer
  • What is ribose?...................
    11·2 answers
  • The ribosome of a cell, is most responsible for what function?
    6·1 answer
  • The net energy yield from this pathway, where glucose is broken down through several steps forming pyruvate, is ________ molecul
    6·1 answer
  • What is the digestive fluid called that is released by the pancreas? *
    13·2 answers
  • In a mixture of sand and rock in gravel, different components are easily observed. Which term best describes this mixture?
    11·1 answer
  • Describe how a supernova and neutron star are related?
    13·1 answer
  • True or False: The vast majority of creatures that have ever lived are not
    12·1 answer
  • List and describe the most important erosional and depositional features of a river and how these features form.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!