Comprehensive Study Guidance for College Biology Final Exam Review

Study Guide - Smart Notes

Tailored notes based on your materials, expanded with key definitions, examples, and context.

Q1. Define cell cycle:

Background

Topic: Cell Cycle

This question is testing your understanding of the cell cycle, which is the series of events that cells go through as they grow and divide. Knowing the definition is foundational for understanding cell division and regulation.

Key Terms:

Cell cycle: The ordered sequence of events in the life of a cell, from its origin in the division of a parent cell until its own division into two daughter cells.
Interphase: The phase where the cell grows, replicates its DNA, and prepares for division.
Mitotic (M) phase: The phase where the cell divides its copied DNA and cytoplasm to make two new cells.

Step-by-Step Guidance

Start by describing the cell cycle as a repeating process that includes growth, DNA replication, and cell division.
Mention that the cell cycle is divided into interphase (G1, S, G2 phases) and the M phase (mitosis and cytokinesis).
Explain that the cell cycle ensures genetic material is accurately duplicated and distributed to daughter cells.

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Q2. Sketch a cell cycle and show division phase and interphase. Then label all three phases within the interphase and all 5 phases within division phase on the figure, in the correct order. Mark the checkpoints at correct places.

Background

Topic: Cell Cycle Phases and Checkpoints

This question tests your ability to visualize and organize the stages of the cell cycle, including the order of phases and the placement of checkpoints that regulate progression.

Key Terms:

G1 phase, S phase, G2 phase (interphase)
Prophase, Metaphase, Anaphase, Telophase, Cytokinesis (M phase)
Checkpoints: G1, G2, and M checkpoints

Step-by-Step Guidance

Draw a circular diagram to represent the cell cycle, dividing it into interphase and M phase.
Within interphase, label G1, S, and G2 in the correct order.
Within the M phase, label the five stages: prophase, metaphase, anaphase, telophase, and cytokinesis.
Mark the G1 checkpoint between G1 and S, the G2 checkpoint between G2 and M, and the M checkpoint during metaphase.

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Q3. What happens during G1 phase? S phase? G2 phase? M phase of mitosis? M phase of meiosis?

Background

Topic: Cell Cycle Phases

This question checks your understanding of the specific events that occur in each phase of the cell cycle, both in mitosis and meiosis.

Key Terms:

G1 phase: Cell growth and preparation for DNA replication
S phase: DNA synthesis (replication)
G2 phase: Preparation for mitosis/meiosis
M phase: Division of the nucleus and cytoplasm

Step-by-Step Guidance

For each phase, write a brief description of the main event(s) that occur.
For G1, focus on cell growth and organelle duplication.
For S, describe DNA replication.
For G2, mention preparation for division (e.g., protein synthesis, organelle replication).
For M phase, distinguish between mitosis (somatic cell division) and meiosis (gamete formation), noting the key differences in outcomes.

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Q4. During which phase of interphase may a cell carry double the amount of DNA than normal?

Background

Topic: DNA Replication in the Cell Cycle

This question tests your understanding of when DNA content doubles during the cell cycle.

Key Terms:

Interphase: G1, S, G2 phases
DNA replication: Occurs during S phase

Step-by-Step Guidance

Recall that DNA replication occurs during one specific phase of interphase.
Consider what happens to DNA content before and after this phase.
Think about which phase would have double the DNA compared to the original amount.

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Q5. What are sister chromatids? How are they related to chromosomes?

Background

Topic: Chromosome Structure

This question is about the structure of chromosomes after DNA replication and how sister chromatids are formed and related to chromosomes.

Key Terms:

Sister chromatids: Identical copies of a chromosome connected by a centromere
Chromosome: A DNA molecule with associated proteins

Step-by-Step Guidance

Define what a chromatid is and how sister chromatids are produced during DNA replication.
Explain how sister chromatids are joined together and when they separate.
Describe the relationship between a chromosome and its sister chromatids in the context of the cell cycle.

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Q6. Human cells have 46 chromosomes. At the end of which phase would they have 92 sister chromatids still attached to each other?

Background

Topic: Chromosome Number During the Cell Cycle

This question tests your understanding of chromosome duplication and the timing of chromatid attachment.

Key Terms:

Chromosome: Structure containing DNA
Sister chromatids: Duplicated chromosomes attached at the centromere
Phases: G1, S, G2, M

Step-by-Step Guidance

Recall when DNA replication occurs and how it affects the number of chromatids.
Consider the state of chromosomes before and after S phase.
Identify the phase where each chromosome consists of two sister chromatids, totaling 92 chromatids in a human cell.

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Q7. If a cell contains 10 picograms of DNA in G1 phase, at the end of which phase would you first find 20 picograms of DNA in this same cell? At the end of which phase would this DNA content go back to 10 picograms?

Background

Topic: DNA Content Changes During the Cell Cycle

This question tests your ability to track DNA content through the cell cycle phases.

Key Terms:

G1 phase: Normal DNA content
S phase: DNA replication
M phase: Cell division

Step-by-Step Guidance

Identify the phase where DNA replication occurs, doubling the DNA content.
Determine after which phase the DNA content would return to the original amount due to cell division.
Think about the sequence of events: G1 → S → G2 → M.