A215 Chapter 2 Lecture qUIZ

What is the active region of the DNA that directs the synthetic activity of the cell?

• Histone

• Nucleosome

• Extended chromatin

• Condensed chromatin

• Nucleus

Muscle cells have high energy demands. Therefore, these cells likely have large numbers of:

• Ribosomes

• Smooth ER

• Mitochondria

• Lysosomes

• Chromatin

Which of the following mechanisms of membrane transport does NOT move substances down their concentration gradients?

• Simple diffusion

• Active transport

• Facilitated transport

• Osmosis

• Both b and c

Some of your white blood cells are involved in protecting you from bacteria. When these cells feel the surface markers on bacteria, they ingest them and destroy them. This process is called:

• Pinocytosis

• Phagocytosis

• Exocytosis

• Receptor-mediated endocytosis

• Mitosis

Why is telophase thought of as prophase in reverse?

• Chromatin coils and condenses into chromosomes in prophase while chromosomes begin to uncoil back into chromatin in telophase

• The nuclear envelope breaks up in prophase while the nuclear envelope reforms in telophase

• The mitotic spindle forms in prophase while the mitotic spindle breaks down in telophase

• Both a and b

• All of the above