Which of these bacteria perform photosynthesis?

1. Which of these bacteria perform photosynthesis?

Select one:

a. clostridia

b. cyanobacteria

c. mycobacteria

d. spirochetes

2. Which type of RNA transports the DNA master code to ribosomes?

Select one:

a. messenger (mRNA)

b. transfer (tRNA)

c. ribosomal (rRNA)

d. single-stranded (ssRNA)

3. Pieces of genetic material that are contained within bacteria but replicate

independently of the cell’s chromosomes are called which of the following?

Select one:

a. genomes

b. plasmids

c. RNA

d. viruses

4. Which of the following is a characteristic of RNA, but not of DNA?

Select one:

a. It is a double-stranded, helical molecule.

b. It is copied during transcription.

c. The complementary based paired with adenine is thymine.

d. The sugar that is a component of the molecular backbone is ribose.

5. Which of the following is a random change in the DNA arising from errors in

replication?

Select one:

a. crossing over

b. induced mutation

c. spontaneous mutation

d. transmutation