5 Written questions
5 Matching questions
- replication fork
- radioactive isotope
- semiconservative model
- a Type of DNA replication in which the replicated double helix consists of one old strand, derived from the old molecule, and one newly made strand.
- b A short stretch of RNA with a free 3' end, bound by complementary base pairing to the template strand, that is elongated with DNA nucleotides during DNA replication.
- c An isotope (an atomic form of a chemical element) that is unstable; the nucleus decays spontaneously, giving off detectable particles and energy.
- d A Y-shaped region on a replicating DNA molecule where the parental strands are being unwound and new strands are growing.
- e (1) The conversion of a normal animal cell to a cancerous cell. (2) A change in genotype and phenotype due to the assimilation of external DNA by a cell.
5 Multiple choice questions
- Nucleotide sequences, usually noncoding, that are present in many copies in a eukaryotic genome. The repeated units may be short and arranged tandemly (in series) or long and dispersed in the genome.
- The sugar component of DNA nucleotides, having one fewer hydroxyl group than ribose, the sugar component of RNA nucleotides.
- A protein that breaks, swivels, and rejoins DNA strands. During DNA replication, topoisomerase helps to relieve strain in the double helix ahead of the replication fork.
- Site where the replication of a DNA molecule begins, consisting of a specific sequence of nucleotides.
- Member of the prokaryotic domain Bacteria.
5 True/False questions
pyrimidine → One of two types of nitrogenous bases found in nucleotides, characterized by a six-membered ring. Cytosine (C), thymine (T), and uracil (U) are pyrimidines.
double helix → A dense region of DNA in a prokaryotic cell.
chromatin → The complex of DNA and proteins that makes up a eukaryotic chromosome. When the cell is not dividing, chromatin exists in its dispersed form, as a mass of very long, thin fibers that are not visible with a light microscope.
template strand → The new complementary DNA strand synthesized continuously along the template strand toward the replication fork in the mandatory 5'?3' direction.
primase → A short stretch of RNA with a free 3' end, bound by complementary base pairing to the template strand, that is elongated with DNA nucleotides during DNA replication.