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
puteri [66]
3 years ago
13

Which scientists discovered that DNA has the shape of a double helix?

Biology
2 answers:
salantis [7]3 years ago
8 0

Answer:

James Watson and Francis Crick

Explanation:

On February 28, 1953 (60 years ago) two scientists from the University of Cambridge made a discovery that would change genetics forever. James Watson and Francis Crick discovered that the structure of DNA was a double helix and everything then made sense. The two won nothing less than the 1962 Nobel Prize in Medicine or Physiology and became known worldwide.

Biochemist Erwin Chargaff, who started research on DNA composition. He found that the composition of DNA nucleotides varied between species, that is, the same nucleotides did not repeat themselves in the same order as proposed by another researcher.

He also demonstrated that the amount of adenine (A) is always similar to the amount of thymine (T), while the amount of cytosine (C) is similar to that of guanine (G). In other words, Chargaff found that the total purines (A + G) and the total pyrimidines (C + T) were generally equal (A + G = C + T). These discoveries were essential for Watson and Crick to assemble the DNA model, as it is known today.

8_murik_8 [283]3 years ago
6 0

James Watson and Francis Crick discovered the double helix shape of DNA. They based their work on that of Rosalind Franklin who also saw a helix shape when he took images of different DNA proteins.

You might be interested in
Wildlife biologists treated a pool with a chemical to reduce the amount of algae. A(t)=35t-360t+1050
fiasKO [112]

Answer:

-325 + 1050

Explanation: No need to

4 0
3 years ago
Why is radioactive dating important when approximately the age of earth
dimulka [17.4K]

Answer:

By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change. Radiometric dating is also used to date archaeological materials, including ancient artifacts.

Explanation:

hope it helps

3 0
3 years ago
Read 2 more answers
The process of lipid digestion begins even before you take your first bite of food. Just the smell of food can begin digestive j
ikadub [295]

Answer:

The given statements have been rearranged in the following order to depict the flow of events that account for lipid digestion in the human body:

  1. Mechanical digestion by chewing breaks food down.
  2. During digestion, gastric lipases break down fat into fatty acids and triglyceride molecules.
  3. Gastric lipase digests some triglycerides.
  4. The pancreas secretes gastric lipase into the small intestine, where the majority of fat digestion occurs.
  5. Lipid ­digesting enzymes from the pancreas break down the triglycerides into two free fatty acids and a monoglyceride.
  6. Lingual lipase is secreted from the pancreas and breaks down triglycerides.
  7. With the aid of pancreatic lipase, fats are further broken down into free fatty acids and monoglycerides.
  8. Products of fat digestion are packaged into micelles and transported to the enterocytes.

The process is started in the mouth. Action of the teeth physically breaks down the food and increases it surface area that allows for better access to it for the enzymes to carry out mechanical digestion. Gastric lipases are those in the stomach, most of the lipid digestion takes place in the small intestine with the help of enzymes secreted by the pancreas and the small intestine itself. After digestion, the final products are taken up by the lymphatic system.

Hope that answers the question, have a great day!

5 0
3 years ago
How do fish increase lake carbon dioxide levels?
fiasKO [112]

Answer:

they dreath in water?

Explanation:

6 0
3 years ago
Read 2 more answers
What is the study of the moon, stars, meteoroids, and other space objects?
LUCKY_DIMON [66]

austronomy i think

hope this helped

5 0
3 years ago
Read 2 more answers
Other questions:
  • A scientist finds what she thinks is a new species of rodent on a small Pacific island. However, some similar-looking rodents in
    9·2 answers
  • The liver is ___ to the diaphragm
    8·1 answer
  • A team of environmentalists are protesting the disposal of waste generated from slaughterhouses and canneries. What type of wast
    13·1 answer
  • PLEASE HELP!!! I'LL MARK BRAINLIEST IF POSSIBLE!
    14·1 answer
  • 6. What does eutrophication cause?
    10·1 answer
  • Create a food chain with a producer and 3 consumers.
    13·2 answers
  • Which organelle of a cell functions similarly to the envelope of a virus and why?
    11·1 answer
  • What are weedicides?
    7·2 answers
  • Which gases contribute to the greenhouse effect brainly
    10·1 answer
  • Which scientist concluded that all living organisms are made of cells?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!