grade 10 revision

Explain the relationship between cell size and the importance of surface area to volume ratio.

• The smaller the cell, the smaller the surface area to volume ratio.
• The larger the cell, the larger the surface area to volume ratio.
• The larger the cell, the smaller the surface area to volume ratio.
• The size of the cell does not affect the surface area to volume ratio.

Surface area-to-volume ratios affect the ability of a biological system to

• obtain necessary resources and eliminate waste product
• exchange chemicals and energy with the environment
• acquire or dissipate thermal energy
• A and B
• all of the above

How does the concentration of cyclin change as a cell goes through the cell cycle?

• Cyclin concentration remains constant.
• Cyclin concentration increases during interphase and decreases during mitosis.
• Cyclin concentration decreases during interphase and increases during mitosis.
• Cyclin concentration is inversely related to CDK concentrations.

Which of these events happens immediately before cell division occurs?

• The cell’s genetic material is copied.
• The cell’s surface-area-to-volume ratio increases.
• The cell’s volume decreases more than its surface area.
• The cell’s DNA is distributed evenly throughout the cell.

What happens in the first part of Interphase?

• Mitosis
• Cell Growth
• DNA Replication
• Anaphase

Which of the following are external regulators of the cell cycle?

• cyclins
• mitotic spindles
• cancer cells
• growth factors

Structures C are the chromosome with its identical version that was made during DNA replication. What are Structures C?

• Sister Chromatids
• Centromere
• Chromosome
• Gene

Which stage of Mitosis is characterized by nuclear membranes reforming around the 2 groups of chromosomes, the chromosomes going back into chromatin form, the spindle fibers breaking down, and also has cytokinesis occurring at the same time?

• Telophase
• Metaphase
• Prophase
• Anaphase

Why are your muscle cells different from your nerve cells?

• muscle and nerve cells have different DNA, different genes
• muscle and nerve cells have the same DNA (same genes) but different genes are turned on
• muscle and nerve cells began with the same DNA (same genes) but some different genes were destroyed by each cell type
• muscle cells are not different from nerve cells, they are the same

daughter cells in Meiosis have _________ the normal chromosome number.

• half
• equal
• more than
• double