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victus00 [196]
2 years ago
14

Which of the following explains why starch is a polymer?

Biology
1 answer:
kompoz [17]2 years ago
4 0
The answer is the fourth choice
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If a DNA molecule is found to be composed of 40% thymine, what percentage of guanine would be expected.
Likurg_2 [28]

Answer:

10%

Explanation:

Chargaff postulated the complementary base pairing rule, where he stated that in the DNA molecule, Adenine (A) will always pair with Thymine (T) and Guanine (G) with Cytosine (C) i.e. A-T, G-C

Chargaff stated that the concentration of purines (Adenine and Guanine) is always equal to that of pyrimidines (Thymine and Cytosine) i.e. {A} + {G} = {C} + {T}

These equal concentration equals 100% in totality i.e. A+G+C+T= 100%

Thymine pairs with Adenine, if there is 40% of Thymine in the DNA molecule, it means there will be 40% of Adenine also. 40 + 40 = 80%. This leaves us with 100-80 = 20% for Guanine and Cytosine.

Since there will be an equal amount of Guanine and Cytosine too, Guanine will therefore, be 20/2 = 10%.

That is, 10% Guanine, 10% Cytosine.

8 0
3 years ago
How does the Foucault Pendulum show that the Earth rotates?
egoroff_w [7]

The Foucault Pendulum show that the Earth rotates because the pendulum would swing so slowly that it would appear to change direction as the Earth moved away.

<h3>How does the Foucault pendulum work?</h3>

The Foucault pendulum was able to demonstrate experimentally that the Earth revolves around itself with an angular velocity Ω, in a period of 23 hours, 56 minutes and 4 seconds.

Thus, Foucault knew that the longer the string attached to the weight, the slower the swing of his pendulum. He could attach the string above to an almost frictionless pin, and if he used a very large weight, the pendulum would swing so slowly that it would appear to change direction as the Earth moved away.

See more about pendulum at brainly.com/question/14759840

#SPJ1

7 0
1 year ago
How are the mutations in a genome similar to printing a book?
tatiyna
I believe it is B i took this test last year.
6 0
3 years ago
Read 2 more answers
Which mineral helps hold calcium to the teeth making them more resistant to decay
Alex73 [517]
The enamel. For example lemon juice can destroy your enamel it’s like another way that protects the teeth but you should also protect the enamel.
3 0
3 years ago
A bucket of water and a cube of ice have different chemical properties. <br><br> true or false
AURORKA [14]
The answer for this item is FALSE. The water in liquid form and cube of ice have the same chemical properties as they are both water (H2O). Only the physical properties of the liquid water differ from those of the ice. 
7 0
3 years ago
Read 2 more answers
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