★ Biochemistry Quiz
What is the main component of all biological membranes?
A. Fats
B. Nucleotides
C. Amino acids
D. Phospholipids
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Which of the following is true about DNA and RNA?
A. Both DNA and RNA are usually single-stranded
B. Both DNA and RNA are usually double-stranded
C. DNA is usually double-stranded and RNA is usually single-stranded
D. DNA is usually single-stranded and RNA is usually double-stranded
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