Select the statement that is true?
DNA and RNA are both double stranded.
Translation copies DNA to mRNA while transcription converts mRNA into proteins.
DNA has the sugar deoxyribose while RNA has the sugar ribose.
Thymine is only present in DNA while cytosine is only present in RNA.
DNA has the sugar deoxyribose while RNA has the sugar ribose.
The statement that is true is: DNA has the sugar deoxyribose while RNA has the sugar ribose.
To determine which statement is true, let's evaluate each option:
1. "DNA and RNA are both double stranded." - This statement is not true. DNA is usually double stranded, consisting of two complementary strands, while RNA is typically single stranded.
2. "Translation copies DNA to mRNA while transcription converts mRNA into proteins." - This statement is not true. In molecular biology, transcription is the process where DNA is used as a template to synthesize RNA (specifically, mRNA). Translation, on the other hand, occurs after transcription and is the process by which mRNA is decoded to synthesize proteins.
3. "DNA has the sugar deoxyribose while RNA has the sugar ribose." - This statement is true. DNA (deoxyribonucleic acid) contains the sugar deoxyribose, whereas RNA (ribonucleic acid) contains the sugar ribose.
4. "Thymine is only present in DNA while cytosine is only present in RNA." - This statement is not true. Both thymine and cytosine can be found in DNA. However, in RNA, uracil replaces thymine. DNA contains adenine (A), thymine (T), cytosine (C), and guanine (G), while RNA contains adenine (A), uracil (U), cytosine (C), and guanine (G).
Thus, the correct answer is: "DNA has the sugar deoxyribose while RNA has the sugar ribose."