Macromolecules
These bonds hold together two strands of DNA.
What are hydrogen bonds?
This enzyme makes all types of RNA molecules.
What is RNA polymerase?
This type of RNA is never translated.
What is tRNA/rRNA?
This takes up 90% of the time a cell spends in the cell cycle.
What is interphase?
These are composed of multiple genes linked to a single promoter.
What is an operon?
These monomers always contain at least one amino group and one carboxyl group.
What are amino acids?
This nucleotide takes the place of thymine when an mRNA is synthesized.
What is uracil?
The formation of this chemical bond is catalyzed by the ribosome.
What is a peptide bond?
Chromosomes are composed of two of these following S phase.
What are sister chromatids?
The sequence of DNA base pairs is the binding site of a transcriptional repressor.
What is the operator?
Beta-pleated sheet is an example of this level of polypeptide structure.
What is secondary structure?
This phase of transcription occurs between initiation and termination.
What is elongation?
This nucleotide sequence is complementary to a codon.
What is an anticodon?
Chromosomes are lined up on the middle of the spindle during this mitotic phase.
What is metaphase?
This is tightly packaged structure silences gene expression.
What is heterochromatin?
This is the property of most amino acids that are found in the interior of a folded protein.
What is hydrophobic?
This is the direction transcription occurs on the DNA template strand.
What is 3' to 5'?
This type of codon does not specify an amino acid.
What is a stop codon?
This form of cell division is used by bacteria.
What is binary fission?
This structure is made of histones.
What is a nucleosome?
This functional group is attached to the 2' carbon of ribonucleotide.
What is a hydroxyl group?
Polynucleotides are linked together through is type of covalent bond.
What is a phosphodiester bond?
This functional group is found at the 5' end of an mRNA.
What is a phosphate group?
This is where the spindle attaches to the chromosome.
What is the centromere?
Tryptophan binds to this site on the trp repressor.
What is an allosteric site?