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
Romashka-Z-Leto [24]
3 years ago
13

In which direction does the replication fork move as dna replication occurs?

Biology
2 answers:
attashe74 [19]3 years ago
7 0
DNA replication occurs in the 5 prime (5') to 3 prime (3') direction.
I'm sure you've heard this many times. I tutor in genetics, and all of my students can rattle that off. Less understand what it means.

First, understanding what 5' and 3' mean is important. DNA is composed of a ribose sugar, a phosphate group, and a base (A,T,G,C). The sugar has a phosphate group attached to its fifth carbon, and a hydroxyl group on its 3rd carbon. Nucleotides (separate components of DNA) are linked by the phosphate group and the hydroxyl group. So, every nucleotide is linked at the phosphate group and the hydroxyl group besides two - the two nucleotides at either end of the strand of DNA. The one that leaves a phosphate group exposed is called the 5' end of DNA, and the one that leaves a hydroxyl group exposed is called the 3' end of DNA.

<span>A problem with many students just memorizing that replication occurs in the 5' to 3' direction is that there are two strands of DNA involved in replication. DNA polymerase (the major enzyme responsible for replication) reads the already existing strand of DNA in the 3' to 5' direction, and creates the new strand of DNA in the 5' to 3' direction (meaning that it adds nucleotides to the 3' end of the new strand).</span>
Nataly [62]3 years ago
3 0

DNA is always synthesized in the 5’ to 3’ direction.

Replication fork is form within the nucleus during DNA replication and usually created by the enzyme helicase. Helicase function by breaking the hydrogen bond that holds the DNA strands together and the strands will serve as template for the leading and lagging strands. Hence, DNA is always synthesized in the 5’ to 3’ direction.

You might be interested in
You have learned that mutations can occur in dna sequences. are all mutations deadly?
Monica [59]
No, the vast majority of DNA mutations are not physically noticeable, and those that are noticeable physically are mainly cosmetic differences, such as a change in hair color, or heterochromia. 
3 0
3 years ago
In about 100 words, explain how the use of flashback adds meaning to “Rules of the Game.” Be sure to use details from the story
babymother [125]

Answer:

The use of flashback in "Rules of the Game" provides insight into the complicated relationship between Waverly and her mother. Throughout the story, Waverly describes past incidents when cultural differences caused her and her mother to view events differently. Waverly sees events differently because of her American upbringing. Her mother sees events differently because of her Chinese upbringing. Waverly notes that her mother has had difficulty adjusting to American culture. She shows this struggle when she describes her mother’s reaction to the game manual for her brother’s new chess set:

“This American rules,” she concluded at last. “Every time people come out from foreign country, must know rules. You not know, judge say, Too bad, go back. They not telling you why so you can use their way go forward. They say, Don’t know why, you find out yourself. But they knowing all the time. Better you take it, find out why yourself.” She tossed her head back with a satisfied smile.

Explanation:

your welcome

5 0
3 years ago
Read 2 more answers
The flow chart below indicates the hierarchical levels of the Linnaean classification system.
omeli [17]

Answer:

the answer is A

4 0
3 years ago
Read 2 more answers
Edema appears when there is a severe lack of dietary protein because
djyliett [7]
Blood protein levels fall and fluid shifts to the tissues
4 0
3 years ago
During cellular division, one cell divides to become two cells. Then, the two cells divide to become four cells. The four cells
andreyandreev [35.5K]
 (A) the number of cells in an organism
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following is a group of cells that work together to preform a specific function
    10·1 answer
  • In which kidney region are all renal corpuscles located?
    14·1 answer
  • Provide a summary of biologist Stephen Stearns’ findings in how Natural Selection may be working today in humans.
    12·1 answer
  • Two species of clams inhabit the same marine habitat along the Atlantic coast. One releases gametes into the water in early spri
    10·1 answer
  • To assess Mendel’s law of segregation using tomatoes, a true-breeding tall variety (SS) is crossed with a true-breeding short va
    13·1 answer
  • Which of the following statements is true?
    5·2 answers
  • A high-pressure system is moving into an area. Which type of weather can people in this area expect?
    7·2 answers
  • Which makes fast-moving water a greater force of erosion?
    8·2 answers
  • Which of the following is not a reason why cells divide
    14·1 answer
  • Students are learning about plate tectonics and how current topographic features were formed. The students learn
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!