BI 200 – Exam #1
Spring 2000
Name
Section#
Write the entire word TRUE or the entire word FALSE before each of these statements as
appropriate.
___________1. Ribosomes are responsible for the process of transcription.
___________2. 1->4 Glycosidic bonds are digestible by most of the higher animals.
___________3. DNA is single stranded in prokayotes and double stranded in eukaryotes.
___________4. Fossilized microbial mats are known as banded iron formations.
___________5. Bacterial flagella are made of a protein called flagellin.
___________6. Cell membranes are rigid structures that determine the shape of the cell.
___________7. Lysozyme inhibits peptide interbridge formation in growing cells.
___________8. Fimbria are involved in attachment of bacteria.
___________9. Histone proteins occur in supercoiled eukaryotic chromosomes.
___________10. Hydrogenosomes occur in hydrogen consuming aerobic bacteria.
Fill in the blank(s).
11. What is the size of a typical bacterial cell? _____________________
12. How many covalent bonds does each of the following atoms normally form:
hydrogen _______, carbon ________, and nitrogen ______?
13. The nitrogenous base complimentary to cytosine is _____________________, and
there are _____________________ hydrogen bonds involved in the pairing.
14. Oxygen first appeared in the earth’s atmosphere _________________ years ago, and
_________________ were responsible for its synthesis.
15. What is the energy source for the movement of eukaryotic flagella?
_____________________
16. Movement of a molecule from high concentration to low concentration is known as
___________________, and movement of water from high concentration to low
concentration is called __________________.
17. D-amino acids and meso-diaminopimelic acid occur in the
______________________ of peptidoglycan.
18. Carboxysomes are filled with the enzyme _______________, and magnetosomes
contain tiny __________________.
19. How many base pairs in the chromosome of E. coli? _____________________
20. The inner space of a mitochondrion is called ________________, and contains the
enzymes of the ________________ cycle.
Multiple choice
21. Which of the following are prokaryotes?
a.
b.
c.
d.
e.
protozoa
metazoa
algae
fungi
archea
22. Which of the following is not a feature of the lipids of archaea?
a.
b.
c.
d.
ester linkages
isoprene sub-units
ether linkages
branched fatty acids
23.
24. Which appear first in the fossil record?
a.
b.
c.
d.
Plants
Prokaryotes
Trilobites
Dinosaurs
25. The movement of bacterial flagella resembles
a.
b.
c.
d.
a whip
an oar
a foot
a propeller
26. When glucose is transported from low concentration to high concentration into cells
of E. coli, it is immediately transformed into glucose 6-phosphate. This is known as
a.
b.
c.
d.
group translocation
the ABC transport system
symport
facilitated diffusion
27.
28.
29. Which of the following types of genes might be found on a plasmid?
a.
b.
c.
d.
e.
genes for the sex pilus
antibiotic resistance genes
genes for ribosomes
(a) and (b)
all of the above
30.
2 point problems
31. Draw a dehydration reaction between two amino acids, and indicate the resulting
peptide bond.
32. Describe the first stage of chemical evolution. What were the substrates? What were
the products? What energy sources were available? When did it occur?
33. Complete the following table, indicating the chemical structure of cell walls
Microorganism
Algae
Polymer
Bond Arrangement
1->4
Sub-units
Fungi
Bacteria
Archaea
Pseudomurein
N-acetylglucosamine
and N-acetylmuramic
acid
N-acetylglucosamine
and N-acetyltauronic
acid
34. What are 3 advantages to bacteria of forming capsules?
35. Give four lines of evidence that organelles such as mitochondria and chloroplast
arose by endosymbiosis.
A.
B.
C.
D.
5 point problems – complete 2 of 3. Indicate which not to grade.
36. Make a diagram of the gram negative cell envelope. Indicate the following features:
cytoplasm, periplasm, cytoplasmic membrane, outer membrane, cell wall, lipoprotein,
lipopolysaccharide, porin protein, and phospholipid.
37.
38.