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
Alisiya [41]
3 years ago
14

1. After examining the DNA of different organisms, which of the following did Erwin Chargaff conclude about the four bases?

Biology
1 answer:
siniylev [52]3 years ago
4 0

Answer: a). A = T and C = G.

Explanation: Erwin Chargaff's rule states that in a double-stranded DNA molecule, the number of adenine is equal to the number of thymine and the number of cytosine is equal to the number of guanine. This means that there is a ratio purine to pyrimidine in a double-stranded DNA molecule is 1:1.

There are four bases found in the DNA: adenine, thymine, guanine and cytosine and according to the Watson and Crick base pairing rule, adenine pairs with thymine while guanine pairs with cytosine. Adenine and guanine are the purine bases while thymine and cytosine are pyrimidine bases.

You might be interested in
Some bacteria living in the ocean floor can turn methane (a gas) into food.
Nesterboy [21]

Answer:

Option A

Explanation:

Only an autotrophic species can convert methane into food.  

Deep below the sea, methane and hydrogen sulfide are found in abundance. These gases get mixed into the sea water.  

Autotrophic bacteria containing phosynthetic pigments oxidize these dissolved gases thereby producing food.  

Hence these autotrophic bacteria’s will be considered as producers as they produce food.  

Thus, option A is correct.

3 0
3 years ago
Coombs’ reagent is an antiserum with antibodies that bind to human ________.
Feliz [49]

Answer:

Coombs reagent is an antiserum with antibodies that bind to the human <u>antibodies attached on the surface of the erythrocytes.</u>

Explanation:

Coombs test is a blood test used in immunology and immunohematology. It is of two types: direct and indirect.

The Coombs reagent is an antiserum, containing antibodies.

The direct Coombs test detects the antibodies present on the surface of the erythrocytes.

In this test, when the Coombs reagent is reacted with the blood to be tested, <u>the antibodies in the Coombs reagent binds to the antibodies attached on the surface of the erythrocytes in the test blood and cause agglutination.</u>

8 0
3 years ago
Describe two technologies that type I diabetics use to control and monitor their blood sugar levels that can be used by type II
maxonik [38]

Answer:

Diabetes technology has come a long way. From blood glucose meters and continuous glucose monitoring (CGM) to cutting-edge insulin pumps and more, devices are easier to use and less invasive. There are lots of options so that you can find what works best for you.

8 0
3 years ago
What elements do carbon have that allow it to form bonds with other elements
Valentin [98]
Carbon forms bonds with not only common non-metal elements such as hydrogen, oxygen, nitrogen, sulfur, phosphorus, and halogens, but also with most metallic elements. Many of the compounds based on carbon-heteroatom bond are common reagents found in the shelves of chemistry laboratories.
8 0
3 years ago
Tastebuds wear out and are replaced every days
Elina [12.6K]

Answer:

The tongue is covered with around 9,000 taste buds that are replaced every 10 days.

5 0
3 years ago
Other questions:
  • Minerals have an ordered internal atomic arrangement. what does this mean?
    9·1 answer
  • To achieve the maximum benefit for the heart when exercising, your heart rate (in beats per minute) should be in the target hear
    11·1 answer
  • Discuss the implications of each of the following three suggestions that were put forward to overcome the high sulphur dioxide e
    6·1 answer
  • Organisms need nutrients in order to?
    10·2 answers
  • What is a long chain of nucleotides that contains a sugar
    14·1 answer
  • whenreffering to hypertonic isotonic and hypotonic is there a word i could use to describe all of these at once?
    15·1 answer
  • If an organism's diploid number<br> is 50, then what will its haploid
    8·1 answer
  • A population of crabs living on a sandy beach exhibits three colors: dark brown, light
    9·1 answer
  • Receptors trigger one of two effector pathways resulting in changes in neuronal activity. These changes will, ultimately, effect
    14·1 answer
  • What is a sacrolemma?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!