Chapter 3 mc

Molecules of extrachromosomal DNA are also known as:

• Golgi bodies

• lysosomes

• plasmids

• plastids

A bacterium possessing a tuft of flagella at one end of its cell would be called what kind of bacterium?

• amphitrichous

• lophotrichous

• monotrichous

• peritrichous

One way in which an archaean would differ from a bacterium is that the archaean would possess no:

• DNA in its chromosome

• peptidoglycan in its cell walls

• ribosomes in its cytoplasm

• RNA in its ribosomes

Some bacteria stain Gram-positive and others stain Gram-negative as a result of differences in the structure of their:

• capsule

• cell membrane

• cell wall

• ribosomes

Of the following, which one is not found in prokaryotic cells?

• cell membrane

• chromosome

• mitochondria

• plasmids

The three-domain system of classification is based on differences in which of the following molecules?

• mRNA

• peptidoglycan

• rRNA

• tRNA

Which of the following is in the correct sequence?

• Kingdom, Class, Division, Order, Family, Genus

• Kingdom, Division, Class, Order, Family, Genus

• Kingdom, Division, Order, Class, Family, Genus

• Kingdom, Order, Division, Class, Family, Genus

Which one of the following is never found in prokaryotic cells?

• flagella

• capsule

• cilia

• ribosomes

The semipermeable structure controlling the transport of materials between the cell and its external environment is the:

• cell membrane

• cell wall

• cytoplasm

• nuclear membrane

In eukaryotic cells, what are the sites of photosynthesis?

• mitochondria

• plasmids

• plastids

• ribosomes