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True or false Only DNA molecules contain the nitrogen base called uracil?
False. Uracil is a nitrogen base found in RNA molecules, not DNA. In DNA, thymine is the equivalent nitrogen base to uracil.
DNA molecules that are produced by combining DNA from different sources are called?
The word you're looking for may be "recombinant".
Which of the nucleotides occurs in DNA molecules but not in RNA molecules?
Thymine is a nucleotide that occurs in DNA molecules but not in RNA molecules. In RNA, thymine is replaced by uracil.
How are DNA replication and transcription similar?
RNA molecules produced by transcription are much shorter in length than DNA molecules produced by replication. Also in DNA replication the compliment of Adenine is Thymine. In transcription the compliment of Adenine is Uracil.
What enzyme is responsible for cutting DNA molecules?
The enzyme responsible for cutting DNA molecules is called a restriction enzyme.
Some organisms use singlestranded rather than doublestranded DNA In these organisms which enzyme would probably not be needed for DNA replication?
Some viruses have single stranded DNA molecules. These viruses do not have the machinery to synthesise the DNA on their own. They insert their DNA in a living cell where the DNA synthesis takes place.
True or false After replication the nucleotide sequences in both DNA molecules are identical to each other and to the original DNA molecule?
True. After replication, the nucleotide sequences in both DNA molecules are indeed identical to each other and to the original DNA molecule. This ensures that genetic information is accurately duplicated during cell division.
Will ethidium bromide stain double stranded DNA or single stranded DNA?
both, though DNA will preferentially form doublestranded DNA at room temperature. it can be quite hard to get single stranded DNA other than by heating your sample up to 95 degrees Celcius.
Are DNA molecules transported out through the pores?
no this is not true
Which description is true for both DNA and RNA molecules?
Both DNA and RNA are nucleic acids composed of nucleotides with a sugar-phosphate backbone. They both contain adenine, cytosine, and guanine as bases, but RNA contains uracil instead of thymine. Both molecules are essential for storing and transferring genetic information in cells.
Does adenine nuleotide occur in DNA but not in RNA molecules?
Adenine occurs in both RNA and DNA molecules. It is uracil that replaces thymine in the RNA molecule.
Is uracil always paired with adenine in double-stranded DNA?
No, Uracil doesn't occur in double stranded DNA. Doublestranded DNA contains Guanine paired with Cytosine and Adenine paired with Thymine. In RNA, however, Adenine is always paired with Uracil instead of Thymine.
Is the order of base pairsfrom top to bottomdifferent or the same for each new DNA molecules?
Assuming that no errors occurred during DNA replication, both copies of the new DNA molecules should be identical.
True or false the DNA from your nails is the same DNA as your hair?
True. Both nails and hair are made of a protein called keratin, and the DNA within the cells that produce these structures is the same. Thus, the DNA from your nails is the same as the DNA from your hair.
Scientists use gel electrophoresis to cut dna at a specific nucleotide True or false?
It is true that Scientists use gel electrophoresis to cut DNA molecules at a specific sequence of nucleotides.
When one DNA molecule is replicated the result is two DNA molecules. What is true of the second DNA molecule?
The second DNA is an exact duplicate of the first. If not the second will not work correctly. We call this a mutation.
True or false Only DNA molecules contain the nitrogen base called uracil?
False. Uracil is a nitrogen base found in RNA molecules, not DNA. In DNA, thymine is the equivalent nitrogen base to uracil.
