Fund. Cell Bio. Questions

Of the following description of cells, which statement is NOT correct?

1. Cells can vary enormously in appearance and function.

2. A cell can be a unicellular organism or part of a multicellular organism.

3. Different cells have different chemical makeups and carry out distinct and unique chemical reactions.

4. All cells are believed to have evolved from a common ancestral cell.

5. Cells are self-replicating units.

1. Different cells have different chemical makeups and carry out distinct and unique chemical reactions.

Which statement is NOT true about the events/conclusions from studies during

the mid-1800s surrounding the discovery of cells?

a. Cells came to be known as the smallest universal building block of living

organisms.

b. Scientists concluded that new cells could form spontaneously from the remnants of ruptured cells.

c. Light microscopy was essential in demonstrating the commonalities between plant and animal tissues.

d. New cells arise from the growth and division of previously existing cells.

e. Cells of a multicellular organism are architecturally and functionally similar to that of a unicellular organism.

b. Scientists concluded that new cells could form spontaneously from the remnants of ruptured cells.

Prokaryotic cells can evolve rapidly, which helps them to quickly adapt to new food sources and develop resistance to antibiotics. Which of the options below lists the three main characteristics that support the rapid evolution of prokaryotic populations?

a. microscopic size, motile, anaerobic

b. aerobic, motile, rapid growth.

c. no organelles, cell wall, can exchange DNA.

d. large population, rapid growth, can exchange DNA.

e. cell wall, motility, sporulation

d. large population, rapid growth, can exchange DNA.

The following are differences between the rough and the smooth endoplasmic

reticulum EXCEPT

a. Rough ER has both an inner and outer membrane whereas smooth ER has a single membrane

b. They are enriched in different cell types, e.g. muscle cells have an abundance of SER.

c. They look different under the electron microscope

d. They have distinct functions in cells

e. Their prominence can vary among the different cell types.

a. Rough ER has both an inner and outer membrane whereas smooth ER has a single membrane

Which of the following is NOT a function of the endoplasmic reticulum

a. detoxification of drugs and xenobiotics

b. synthesis of membrane lipids

c. synthesis of various steroid hormone such as the glucocorticoids

d. sequesters and buffers intracellular Ca** concentration

e. clearance of aging and dysfunctional mitochondria

e. clearance of aging and dysfunctional mitochondria