Beckers World of the Cell: chapter 1a

17) 1 mm = ________ nm

A) 1 ,000,000

1) Which scientist is credited with coining the term cell from the Latin cellulae? A) Robert Hooke

A) Robert Hooke (Robert Hooke)

7) Cellbiology emerged from which of the following fields of biology?

A) biochemistry B) genetics C) cytology D) all of the above

11) You wish to obtain a pure mitochondria sample from lysed cells. The best way to obtain this sample would be

A) centrifugation.

20) Which type of microscopy has the greatest resolving power?

A) electron

13) Which laws were formulated by Mendel?

A) heredity

14) The steps of the scientific method, in the correct order, are:

A) make observations, formulate the hypothesis, design experiments, collect data, interpret results, and draw conclusions.

10) The limit of resolution can best be defined as

D) the distance that two objects must be apart to be distinguished as separate objects.

8) Which of the following is smallest?

B) protein

6) Which of the following is closest to a micrometer in size? A) the length of a plant cell B) the size of a ribosome C) a typical bacterial cell D) the width of a strand of DNA E) the length of a chicken egg

C) a typical bacterial cell

3) Which organelle is round and derives its name from the Latin word for "kernel"?

C) nucleus (nucleus)

9) Early microscopes did not allow clear visualization of cells because they were limited by

C) resolution.

5) Which of the following is true of a nanometer?

D) A nanometer is equivalent to 10 Angstroms (Å).

19) Which of the following is true of fluorescence microscopy?

E) Fluorescent light is emitted throughout the specimen being viewed.

12) Gregor Mendel was most influential in which field of biology?

E) genetics

21) Which of the following can only be viewed by electron microscopy?

E) viruses

16) In studying osteoporosis in humans, you wish to test a newly designed treatment for efficacy. Your best choice for a model organism would be

B) Mus musculus.

2) In 1665, ________ used a microscope that he had built to examine thin slices of ________. While examining this material, he observed tiny compartments that he called cellulae.

B) Robert Hooke; cork (Robert Hooke examined corkcells)

4) Which of the following is not a tenet of the cell theory?

D) All cells have a membrane-bound nucleus.

15) All of the following are model organisms, except

D) Homo sapiens.

18) Which of the following is false of brightfield microscopy?

D) Specimens are always viewed without being stained.