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BIOL 241 Cell Cycle

Cell Cycle

QuestionAnswer
About 70-90% of the life of the cell is spent in this phase: Interphase
Chromosomes have not formed in this phase of the cell cycle: Interphase
In this phase of the cell cycle, 92 chromosomes form: Anaphase
In this phase or stage, DNA replication occurs: S of interphase
In this phase of cell cycle kinetochores divide: Anaphase
In this phase of the cell cycle, cytokinesis occurs: Telophase
In this phase of the cell cycle, chromosomes line up on an imaginary equator: Metaphase
In this phase of the cell cycle, the nucleoli atrophy: Early prophase
In this phase of the cell cycle, the centrosomes are located at the poles: Metaphase, Anaphase, Telophase
In this phase of the cell cycle, the cell "decides" whether to divide, become quiescent or differentiate: G1 of interphase
In this phase of the cell cycle, the centrosomes divide: G2 of interphase
In this stage of the cell cycle, the nuclear envelope atrophies and the spindles and connect to the kinetochores: Late prophase
In this stage of the cell cycle, polypeptide synthesis can occur: Interphase
In this phase of the cell cycle, the centrioles within the centrosomes replicate: G1 of interphase
In this phase of the cell cycle, the cell grows until the surface area to volume ratio initiates mitosis: G2 of interphase
In this phase of the cell cycle, the nucleolus is apparent, chromosomes have not formed, and the nuclear envelope is still seen: Interphase
What is the major enzyme that is responsible for DNA replication? Helicase
What is DNA replication? When the DNA molecule splits and each strand attracts matching DNA nucleotides, forming two DNA molecules, half of which are from the old DNA molecule, the other half being completely new.
Division of the nucleus: Cytokinesis
Product of mitosis in humans: Two cells with equal cytoplasm, each with 46 chromosomes
Function of mitosis: Growth & Tissue repair
Production of mRNA occurs during: Interphase & Transcription
Polypeptide produced Translation
Where does transcription occur? Nucleoplasm
Where does translation occur? Cytoplasm
Which organelle is involved most closely with translation? Ribosomes
Which enzyme is involved in transcription? RNA polymerase
Which does not match up in transcription? DNA adenine attracts to RNA thymine
Which molecule carries amino acides to the site of polypeptide synthesis? tRNA
At the beginning of polypeptide synthesis, anticodons initially match up with their complements in which site? P site
Except after the initial binding of the anticodon at the beginning of polypeptide synthesis, when an anticodon binds and the ribosome then moves, where is the anticodon? P site
The tRNA in the A site receives the polypeptide chain from which site? P site
After a tRNA gives up its polypeptide chain, the ribosome moves down and the tRNA leave from which site? E site
Which enzyme attaches new amino acids onto the molecule that transports them to the site of polypeptide synthesis? Aminoacyl-tRNA synthetase
Once polypeptides are made , where are they processed into proteins? Rough Endoplasmic Reticulum
Created by: rpm824