Bio 205 exam 2 part 1

Bio 205 Exam 2 Points: 150
1. Which of the following enzymes is responsible for removing the supercoiling from
DNA by
unwinding it, so it can be replicated?
a. Topoisomerase (Gyrase)
b. Ligase
c. RNA Polymerase
d. DNA Polymerase
e.Primase

2. This drug is commonly used to treat systemic fungal infections. It disrupts their cell
membranes.
a. Amphotericin B
b. Penicillin
c. Gramicidin
d. Bacitracin
e. Pyocyanin
3. Fungi that can be multicellular or unicellular are:
a. Basidiomycetes
b. Molds
c. Dimorphic Fungi
d. Zygomycetes
e. Yeasts
4. Which of the following statements is correct about the archaea?
a. Archaea can have a bacillus or coccus structure like the bacteria.
b. Archaea can produce enterotoxins that cause GI tract diseases.
c. Archaea have the same ribosome structure as bacteria.
d. Archaea have a nucleus like eukaryotes.
5. Which of the following is incorrect about protein synthesis?
a. The ribosome is made of proteins and rRNA.
b. The small subunit of the ribosome binds mRNA.
c. The tRNA molecules enter the ribosome at the E site.
d. The amino acids are always linked together at the P site of the ribosome.
6. Sulfa drugs prevent the formation of _______________.
a. The cell wall.
b. Folic acid.
c. Bacteriochlorophyll.
d. The cell membrane.
e. Small ribosomal subunits (30S)