BIOL 221 Final exam MCQ's Questions And Answers Rated 100% Correct
2 views 0 purchase
Course
BIOL 221 MCQ\\\'s
Institution
BIOL 221 MCQ\\\'s
Rank the following lipids in order from MOST SOLID to LEAST solid at room
temperature.(1) Saturated lipids (2) Cis-unsaturated (3) Trans-unsaturated -
️️MOST SOLID (1) > (3) > (2) LEAST SOLID
What type of microscope measures electric current passing through a probe rather than
using p...
BIOL 221 Final exam MCQ's
Rank the following lipids in order from MOST SOLID to LEAST solid at room
temperature.(1) Saturated lipids (2) Cis-unsaturated (3) Trans-unsaturated -
✔️✔️MOST SOLID (1) > (3) > (2) LEAST SOLID
What type of microscope measures electric current passing through a probe rather than
using part of the electromagnetic spectrum? - ✔️✔️Atomic force
It was mentioned in an earlier lecture that science should be "predictive". What does
this mean? - ✔️✔️If you change a variable in an experiment, you know how the results
will change
In Pasteur's famous experiment that finally disproved spontaneous generation, bacteria
grew____. - ✔️✔️Only in media that came into contact with other bacteria.
What are prions? - ✔️✔️Infectious proteins with no nucleic acid.
What happens when water hydrates itself? - ✔️✔️H3O+ and OH- ions form.
This reaction is an example of ___________. (pictures one molecule breaking down into
two) - ✔️✔️Hydrolysis
The pH inside bacterial cells is 7. The pH outside is 5. What is the size of the H+
gradient? - ✔️✔️There are one hundred times as many protons outside the cell than
inside.
Humans cannot digest cellulose, though, bacteria can because
______________________. - ✔️✔️Humans cannot digest β-glycosidic bonds, but
bacteria can.
Which of the following amino acids does NOT have D- and L- stereoisomers? -
✔️✔️Glycine
What type of microscope views a specimen with light refracted from the specimen rather
than light that passed through the specimen? - ✔️✔️Dark field
Which of the following CANNOT participate in hydrogen bond formation? - ✔️✔️The H
in C-H
, In an environment that was isotonic to a bacterial cell's cytoplasm, what effect would
penicillin have on logarithmic phase Gram-positive round-shaped cells? - ✔️✔️The
cells would lose their shape.
What type of microscope uses special prisms to make a thin specimen appear pseudo-
3-dimensional? - ✔️✔️Differential interference contrast (Nomarski)
Refer to the diagram of peptidoglycan on the right. What is different between Gram-
negative and Gram-positive peptidoglycan? - ✔️✔️The structure marked "A" is only
found in Gram-positive cells.
What is the main advantage of using an electron beam rather than light to illuminate a
specimen? - ✔️✔️Electrons have a shorter wavelength than light.
What is one unique feature of the Mycobacterial cell wall? - ✔️✔️It contains a thick
layer of very dense lipids.
Which of the following is NOT true of the PTS (phosphotransferase) transport system? -
✔️✔️It involves the direct transfer of a phosphate from ATP to glucose.
What is the "Sec translocon"? - ✔️✔️A transporter that inserts proteins with a signal
sequence through the cytoplasmic membrane.
An organism with carboxysomes would be expected to be a _______________. -
✔️✔️Autotroph
A bacterium is growing in a medium with a [K+] of 1mM. The bacterium uses uniport to
accumulate K+ to a 10mM concentration inside the cell. What is the energy for this
transport - ✔️✔️The membrane potential.
Which of the following is NOT a function of capsules or slime layers? - ✔️✔️Motility
Why are scientists interested in Type III secretion systems? - ✔️✔️They are often
associated with insertion of toxins directly into eukaryotic cells.
Volutin (metachromatic) granules are used to store __________. - ✔️✔️Phosphate
Tubes 1-5 represent growth in shake tubes with thioglycolate media. Which of the
following is trueof the organisms growing in Tube 5? - ✔️✔️They use O2 as a terminal
electron acceptor.
How are pili involved in bacterial motility? - ✔️✔️They are extended and retracted like
grappling hooks.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ACADEMICMATERIALS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
