Exam (elaborations)
BIL 255 EXAM 2 AND 3 ALL QUESTIONS AND VERIFIED ANSWERS
- Course
- Institution
BIL 255 EXAM 2 AND 3 ALL QUESTIONS AND VERIFIED ANSWERS...
[Show more]
Content preview
The function of a(n) _________ cell, which has a long, branched structure,requires many connections to be made with neighbouring cells.
Nerve
All living cells
share the same basic chemistry
Self-replication of living cells occurs through the catalytic action of
proteins
Mistakes in replicating the DNA of a cell before division
can have positive, negative, or neutral effects.
The genes in the genome of an adult organism
are expressed or silenced depending on whether a gene is needed in that cell
type and environment.
Which of the following microscopy techniques would allow the most detailed
image showing the 3-D structure of a flagellum?
scanning electron microscopy
Which of the following microscopy techniques allows the observation of living
cells (i.e., NOT fixed cells)?
fluorescence microscopy
The defining property that differentiates prokaryotic cells from eukaryotic cells
is their
lack of a nucleus.
Compared to eukaryotes, prokaryotic organisms are
,more abundant and more widespread on Earth.
Archaea and bacteria are two separate domains of prokaryotes that were
distinguished by examining
their DNA sequences.
The main function of the nucleus is to
house the DNA in a separate cell compartment.
The inner membrane of the mitochondrion appears ___________ because it
provides___________.
folded; a large surface area for staging energy production processes
One piece of evidence indicating that chloroplasts evolved from engulfed
photosynthetic bacteria is
that they contain their own DNA.
Lysosomes and peroxisomes both perform a series of reactions to break down
molecules, but one difference between them is that
peroxisomes contain hydrogen peroxide.
The organelle shown in the figure is the ___________ and one of its main
functions is to ___________.
Golgi apparatus; package and modify proteins for secretion
The cell components that move materials from one organelle to another are
called
transport vesicles.
Which cell component is indicated in the figure below by the line labeled "1"?
cytosol
Which of the following accurately matches the types of filaments in the
cytoskeleton with their cellular function?
microtubules—chromosome segregation; intermediate filaments—
strength/support; actin filaments—cell movement
Which of the following is a role of the cytoskeleton in plant cells?
,Microtubules form tracks for movement of cell components.
The rules of which fundamental process were elucidated in the bacterium
Escherichia coli (E. coli)?
DNA Replication
The fruit fly, Drosophila melanogaster (D. melanogaster) is an excellent model
for studying fundamentals of development because
many of the genes involved in the development of the fruit fly are also found in
humans.
Genome size does not precisely determine gene number, as illustrated in the
table below. What is a plausible explanation as to why A. thaliana, a plant, has a
similarly sized genome as the fruit fly, but twice the number of protein-coding
genes?
Plants have more genes that were duplicated during evolution
If a gene sequence in one organism is highly similar to the sequence of another
gene in another organism it is called
homologous.
A segment of DNA in the genome that is not a protein-coding gene
can be used to regulate gene activity.
Cells encode their information in _____ and rely on ____ for catalytic activities.
Cells encode their information in DNA and rely on proteins for catalytic
activities.
All cells use _____ to encode their hereditary information.
DNA
Cells turn ___ into ___ and then ____ into ____.
DNA --> RNA --> proteins
Resolution of light microscope can reach up to
20 nm
, Bacteria and archaea are ______ cells that do not contain a ____ and, despite
their physical similarities, diverged about 3.5 billion years ago.
Bacteria and archaea are prokaryotic cells that do not contain a nucleus and,
despite their physical similarities, diverged about 3.5 billion years ago.
What are eukaryotic cells characterized by?
Having a nucleus with DNA and mitochondria for respiration
Eukaryotic cells contain...
a. a nucleus with DNA and the rest of the molecules in the cytoplasm in a
crowded soup.
b. a nucleus with DNA and the rest of the molecules in the cytoplasm in static
compartments called organelles.
c. a nucleus enclosing most DNA and specialized dynamic compartments called
organelles in the cytoplasm.
d. a nucleus enclosing some DNA, most DNA in mitochondria, and specialized
compartments called organelles in the cytoplasm.
e. a nucleus enclosing most of the DNA, mitochondria performing respiration
and containing some DNA, and specialized compartments called organelles in
the cytoplasm.
c. a nucleus enclosing most DNA and specialized dynamic compartments called
organelles in the cytoplasm.
e. a nucleus enclosing most of the DNA, mitochondria performing respiration
and containing some DNA, and specialized compartments called organelles in
the cytoplasm.
Modern organisms for eukaryotic cells, plants, and animals are...
Eukaryotic: yeast
Plant: arabidopsis thaliana
Animal: drosophila
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 Boostertips. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77254 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now