Eukaryotic cells spend most of their cell cycle in which phase? * interphase
Chromatin, the stuff chromosomes are made of, is made up of what? * protein and DNA
Which of the following occurs during interphase? * cell growth and duplication of the chromosomes
The cell has a very narrow middle separating two bulging ends. It sort of looks like the number 8! Then you realize, this is a cell * Undergoing cytokinesis.
During which phase of mitosis do the chromosomes line up on a plane located equidistant * Metaphase
Which one of the following does not occur during mitotic anaphase? * The chromatid DNA replicates.
Nucleotides * Contain nitrogenous bases. * Contain sugar molecules. * Contain phosphate groups. * Can be linked together to form nucleic acids. * All of the choices are correct.
DNA differs from RNA because DNA * contains thymine in place of uracil
Genetic information is encoded in the * sequence of nucleotides in DNA
The transfer of genetic information from DNA to RNA is called * Transcription
We would expect that a 36-nucleotide sequence will direct the production of a polypeptide that consists of * 12 amino acids
The directions for each amino acid in a polypeptide are indicated by a codon that consists of
__________ nucleotide(s) in an RNA molecule. * 3
A base substitution mutation in a gene sometimes does not result in a different protein.
Which of the following factors could account for this? * some amino acids are produced from more than one codon
Translation consists of which of the following? * the conversion of genetic information from the language of nucleic acids to the language of proteins What type of bonds hold the two strands of a DNA double helix together? * Hydrogen
Which nucleotides (abbreviated by their bases) pair? * A with T, G with C
A dihybrid cross is * a breeding experiment in which the parental varieties differ in only two traits
The ribosome is * an organelle in the cytoplasm that directs protein production
tRNA * is an RNA molecule to which specific amino acids can attach.
rRNA * is a major structural component of the ribosome
mRNA * is the genetic transcript that is translated into a protein
Amino acid sequence of a protein is that protein’s * Primary structure
The mitotic spindle directs the * movement and segregation of the chromosomes during mitosis
A cell that goes through 1 round of the cell cycle without recognizing the proper signal to enter cytokinesis will * have 2 nuclei
A cell that goes through 4 rounds of the cell cycle without recognizing the proper signals to enter cytokinesis (i.e., no cytokinesis has occurred) will * have 16 nuclei
The genetic code is the set of codons that * determine how DNA or mRNA sequences are ultimately translated into amino acid sequences. The enzyme involved with DNA polymerization is * DNA polymerase
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