bio156 Exam 5
Which of the following enzymes catalyzes the linking together of RNA nucleotides to form RNA?
RNA polymerase
At the conclusion of meiosis I, the daughter cells are?
The daughter cells of meiosis I are haploid, and the sister chromatids are still joined.
A promoter is a specific binding site for?
The enzyme RNA polymerase.
An anticodon is?
a set of triplet bases that is complementary to a codon triplet on mRNA.
Two chromosomes in a nucleus that carry genes controlling the same inherited characteristics are called?
homologous chromosomes
DNA replication occurs?
in the S phase of interphase.
During which phase of mitosis do the chromosomes line up on a plane equidistant from the two spindle poles?
metaphase.
Monomers for the synthesis of DNA are called?
nucleotides.
During which stage of meiosis do synapsis and crossing over occur?
prophase 1
_______is the phase during mitosis in which the mitotic spindle begins to form?
prophase.
In meiosis II?
sister chromatids are separated.
During the process of translation, _____ matches an mRNA codon with the proper amino acid. .
tRNA
During which stage of mitosis does the nuclear envelope begin to form?
telophase.
Within one chromosome, what is the relationship between the sequence of bases in DNA of one sister chromatid compared to the other?
the sequences are identical.
_______ occurs during interphase?
Cell growth and duplication of the chromosomes.
What enzyme joins DNA fragments?
DNA ligase
What enzyme catalyzes the elongation of a new DNA strand?
DNA polymerase
If one strand of DNA is CGGTAC, the corresponding strand would be?
GCCATG.
The two strands of DNA are joined together through?
Hydrogen bonds between nucleotide bases.
The first amino acid inserted into a new polypeptide chain in eukaryotic cells is always?
Methionine.
Any change in the nucleotide sequence of DNA is called?
A mutation
Crossing over is important because?
Allows the exchange of genes between homologous chromosomes.
What statement is true about double-stranded DNA?
The strands run in opposite directions
Experiments have demonstrated that the "words" of the genetic code(the units that specify amino acids)are?
Three-nucleotide sequences.
What process takes place in the cytoplasm?
Translation.
On one strand of DNA, one nucleotide is linked to the next through?
covalent bonds between the sugar of one nucleotide and the phosphate of the next.
When animal cells are grown in a petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. This arrest of division is an example of?
density-dependent inhibition.
What is the proper order of the following events in the expression of a eukaryotic gene?
transcription, RNA processing, translation.