Bio 109- Problem Set 1 Flashcards


Set Details Share
created 2 years ago by mehoffelmeyer
7 views
Problem Sets primarily address the Bloom's taxonomy categories of comprehension, application, analysis, and evaluation.
updated 2 years ago by mehoffelmeyer
Subjects:
biology 2
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:
1
card image

The following table depicts characteristics of five prokaryotic species (AE). Use the information in the table to answer the following question.

How many of these species probably have a cell wall that partly consists of an outer membrane of lipopolysaccharide?

three species

2
card image

The following table depicts characteristics of five prokaryotic species (AE). Use the information in the table to answer the following question.

Gram-variable prokaryotes are, sometimes, those without any peptidoglycan. Which two species are most likely to be archaeans?

Species A and B

3
card image

The following table depicts characteristics of five prokaryotic species (AE). Use the information in the table to answer the following question.

Which species should be able to respond most readily to taxes (plural of taxis)?

Species C

4
card image

The following table depicts characteristics of five prokaryotic species (AE). Use the information in the table to answer the following question.

Which two species might be expected to cooperate metabolically, perhaps forming a biofilm wherein one species surrounds cells of the other species?

Species A and B

5

In a hypothetical situation, a bacterium lives on the surface of a leaf, where it obtains nutrition from the leaf's nonliving, waxy covering, while inhibiting the growth of other microbes that are plant pathogens. If this bacterium gains access to the inside of a leaf, it causes a fatal disease in the plant. Once the plant dies, the bacterium and its offspring decompose the plant. What is the correct sequence of ecological roles played by the bacterium in the situation described here? Use only those that apply.
1. nutrient recycler
2. mutualist
3. commensal
4. parasite
5. primary producer

2, 4, 1

6

Foods can be preserved in many ways by slowing or preventing bacterial growth. Which of these methods should be least effective at inhibiting bacterial growth?

-Canning in heavy sugar syrup: creates osmotic conditions that remove water from most bacterial cells.

-Closing previously opened containers: prevents more bacteria from entering, and excludes O2.

-Pickling: creates a pH at which most bacterial enzymes cannot function.

-Refrigeration: slows bacterial metabolism and growth.

-Irradiation: kills bacteria by mutating their DNA to such an extent that their DNA-repair enzymes are overwhelmed.

Closing previously opened containers: prevents more bacteria from entering, and excludes O2.

7

Paulinella chromatophora is one of the few cercozoans that is autotrophic, carrying out aerobic photosynthesis with its two elongated "cyanelles." The cyanelles are contained within vesicles of the host cell, and each is derived from a cyanobacterium, though not the same type of cyanobacterium that gave rise to the chloroplasts of algae and plants.

-This finding is an example of the phenomenon known as "serial endosymbiosis."

-This finding is the first evidence that eukaryotic cells do not necessarily digest prokaryotic cells that manage to gain access to their cytoplasm.

-This finding is the strongest evidence yet for the theory of endosymbiosis.

-This finding indicates that there is a second evolutionary lineage of photosynthetic eukaryotes.

-This finding represents the first time that primary endosymbiosis has been directly observed.

This finding indicates that there is a second evolutionary lineage of photosynthetic eukaryotes.

8

You are given the task of designing an aerobic, mixotrophic protist that can perform photosynthesis in fairly deep water (for example, 250 m deep), and can also crawl about and engulf small particles. With which two of the following structures would you provide your protist?
1. hydrogenosome
2. apicoplast
3. pseudopods
4. chloroplast from red alga
5. chloroplast from green alga

3 and 4

9
card image

The question refers to the following description and the table.

Diatoms are encased in Petri-platelike cases (valves) made of translucent hydrated silica whose thickness can be varied. The material used to store excess calories can also be varied. At certain times, diatoms store excess calories in the form of the liquid polysaccharide, laminarin, and at other times as oil. The following are data concerning the density (specific gravity) of various components of diatoms, and of their environment.

Judging from the table and given that water's density and, consequently, its buoyancy decrease at warmer temperatures, in which environment should diatoms (and other suspended particles) sink most slowly?

-warm fresh water

-cold fresh water

-warm brackish water

-cold seawater

-warm seawater

cold seawater

10

Paulinella chromatophora is one of the few cercozoans that is autotrophic, carrying out aerobic photosynthesis with its two elongated "cyanelles." The cyanelles are contained within vesicles of the host cell, and each is derived from a cyanobacterium, though not the same type of cyanobacterium that gave rise to the chloroplasts of algae and plants.

The closest living relative of P. chromatophora is the heterotroph, P. ovalis. P. ovalis uses threadlike pseudopods to capture its prey, which it digests internally. Which of the following, if observed, would be the best reason for relabeling P. chromatophora as a mixotroph?

-a threadlike pseudopod

-a contractile vacuole

-a vacuole with food inside

-a secretory vesicle

-a pigmented central vacuole, surrounded by a tonoplast

a vacuole with food inside