3. The Cell

Chromosomes line up in the middle during _______

• Prophase

• Metaphase

• Anaphase

• Telophase

Chromosomes become visible during _________

• interphase

• prophase

• Metaphase

• Telophase

The ______ directs cell activities

• nucleolus

• nucleus

• mitochondria

• Golgi apparatus

Nucleolus is made of ___________

• DNA

• RNA

• DNA and protein

• RNA and protein

The cell membrane ________ ( select all that apply).

• maintains the integrity of the cell

• Provides a barrier to water-soluble substances

• selectively controls entry and exit of substances

• communicates with other biological molecules

Lysosomes perform which task?

• Provide energy for the cell

• Communicate with other parts of the cell

• Break down used up parts of the cell

• Produce spindle fibers during mitosis

Selectively permeable means ________________

• allows some substances to pass, but not others

• does not allow substances to pass through

• Allows all organic substance ot pass, but not inorganic

• allows all substance to pass as long as they are not harmful

___________ is a network of interconnected membranes forming sacs and canals that package proteins.

• Golgi Bodies

• Endoplasmic reticulum

• Mitochondria

• Microtubules

____________ store or transport substances.

• Golgi apparatus

• Lysosomes

• Ribosomes

• Vesicles

Centromeres and replicated chromosomes separate during ________

• interphase

• Metaphase

• Anaphase

• Telophase