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BIOL 241 Cell Cycle
Cell Cycle
| Question | Answer |
|---|---|
| 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
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