Which, if any, of the following is false? A new RNA molecule can begin to be syn
ID: 290352 • Letter: W
Question
Which, if any, of the following is false?
A new RNA molecule can begin to be synthesized from a gene before the previous RNA molecule’s synthesis is completed.
If two genes are to be expressed in a cell, these two genes can be transcribed with different efficiencies.
RNA polymerase is responsible for both unwinding the DNA helix and catalyzing the formation of the phosphodiester bonds between nucleotides
Unlike DNA, RNA uses a uracil base and a ribose sugar.
All of the above are true.
A new RNA molecule can begin to be synthesized from a gene before the previous RNA molecule’s synthesis is completed.
If two genes are to be expressed in a cell, these two genes can be transcribed with different efficiencies.
RNA polymerase is responsible for both unwinding the DNA helix and catalyzing the formation of the phosphodiester bonds between nucleotides
Unlike DNA, RNA uses a uracil base and a ribose sugar.
All of the above are true.
Explanation / Answer
All of the above statements are true.
- RNA is made in the cell by DNA transcription. It is achieved by the opening and unwinding of a small portion of the DNA double helix to expose the bases on each DNA strand. So each strand can synthesise RNA simultaneously.
- Each gene can be transcribed with different efficiency.
- phosphodiester bonds are necessary to form the RNA. And polymerase catalyses for unwinding the DNA.
- DNA has deoxyribose sugar while RNA has ribose sugar. Adenine, Guanine, Cytosine are nitrogenous bases present both in DNA and RNA. While thymine is only found in DNA and uracil is only found in RNA.
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