Answer:
The answer is double helix.
Explanation:
In its natural state, each DNA molecule is actually composed of two single strands held together along their length with hydrogen bonds between the bases. Watson and Crick proposed that the DNA is made up of two strands that are twisted around each other to form a right-handed helix, called a double helix.
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9 is letter d and 10 is a
Lipids are found in cell membranes in double layer which is called "Lipid-bilayer".
So, option A is your answer.
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Answer:
B
Explanation:
Source credibility is very important. If there isn't any other information that proves or disproves your source or double checks it, its not typically "credible"
