234 Answered Questions for the topic Cell Biology

04/15/19

Do all bacterial cells have a double membrane?
I’m reading that gram positive and negative bacteria have an inner plasma membrane surrounding the cytoplasm, then a periplasmic space, then an outer membrane. How does this compare to my general... more
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04/14/19

Why is ATP an important molecule in metabolism?
a. Its terminal phosphate group contains a strong covalent bond that does not contain much chemical energy b. Its hydrolysis provides an input of free energy for exergonic reactionsc. It provides... more
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Cell Biology Biochemistry Pharmacology

04/11/19

What do proton pump inhibitors do?
I know that sodium azide and 2,4-DNPH inhibit proton pumps. The azide is called an inhibitor and 2,4-DNP is called uncoupler. I want to know what's the difference between the mechanisms of action... more
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Cell Biology Biology Genetics Ap Biology

04/10/19

A codon is a group of three bases that specifies a particular amino acid. Which of the following enzymes can ‘read’ codons on an mRNA?
a.DNA polymeraseb.Ribosomec.Primased.RNA polymerase 
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Cell Biology Science Biology Genetics

04/10/19

Where, on the mRNA coding for such a protein, would the ER signal sequence likely be located?
A. The signal sequence is not part of the mRNA and is added separately by an enzyme.B.Immediately before the stop codon.C. Anywhere in the mRNA.D.Immediately after the start codon.
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Cell Biology Biology

04/10/19

How does ubiquitin recognize misfolded proteins?
Misfolded proteins are tagged by ubiquitin and then are destroyed by proteasomes. How does ubiquitin know which protein to tag?
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Cell Biology Biology

04/10/19

Is cell wall and cytoplasm an organelle?
So cell wall is an organelle? Whereas, it is not a membrane-closed organelle? Cytoplasm is an organelle? Whereas, it is not a membrane-closed organelle?
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Cell Biology Botany Life History

04/10/19

Is a microspore diploid?
In gymnosperms the plant body is predominantly sporophytic. It produces microspores or megaspores my textbook says that these undergo reduction division in order to form male gametophytes pollen... more
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Cell Biology Biology

04/10/19

What are the different, high-level programs along which a eukaryotic animal cell can follow?
What are the different, high-level, disjunct (mutually exclusive at one particular point in time) programs or pathways along which a eukaryotic animal cell can follow? Examples of programs would... more
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04/09/19

Is HSV-vector-mediated miRNA expression in dorsal root ganglia stable?
My question is on the following article: "*[Reduction of voltage gated sodium channel protein in DRG by vector mediated miRNA reduces pain in rats with painful diabetic... more
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Cell Biology Biology Botany

04/04/19

Do leaves grow larger by adding cells at the centre or at the edge?
I'm writing a paper on wrinkling of plant leaves. For biological and physical background information, I would like to know whether leaves grow by adding cells at the edge, at the center or in a... more
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04/04/19

Why does a "cascade" of events happen during signal transduction?
I've been watching some videos on signal transduction and it says that because there are enzymes being activated by the signal, then there is a "cascade" which happens afterwards...I don't... more
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04/02/19

True or False. Eukaryotic genomes may have a range of different types of repetitive sequences.
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Cell Biology Biology Energy Pathology

04/02/19

Evidence that Attention Deficit Hyperactivity Disorder (ADHD) is caused by too much cellular ATP?
The question is pretty simple — it's just a theory that I remember my biology teacher mentioned long ago and for years now I've wondered about it without ever asking.Some people with attention... more
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04/02/19

Missing cells from immunopanning?
Why do I not have any cells left in my positive panning plate after transferring from the negative panning plate during immunopanning? I am trying to purify retinal ganglion cells from postnatal... more
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04/01/19

Are Gram negative bacteria classified as such because of their negative membrane potential?
Does the membrane potential usually quoted for Gram negative bacteria (e.g. E. coli) refer to the potential across both membranes? - If yes, then does the potential fall more over the inner or... more
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03/28/19

True or False. Genes in prokaryotes tend to be grouped together in operons, with several genes under the control of a single regulatory region.
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03/27/19

True of False. Three important types of RNA are copy of RNA (cRNA), messenger RNA (mRNA), and transfer RNA (tRNA).
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Cell Biology Biology Zoology Mycology

03/27/19

Has an artificial symbiotic relationship ever been created?
Have 2 organisms ever been introduced to create a symbiotic relationship that doesn't occur in their natural environment?
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Cell Biology Anatomy

03/27/19

Why do some internal organs regenerate?
I have been reading about the human liver and zebra fish heart muscle having the ability to regenerate. It seems to me that these organs have very little chance to become damaged or worn out. At... more
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03/27/19

In mitochondria, what is the mechanism by which electrons are transferred between different cytochromes?
And how is the energy gained from the lowering of the "energy level" of the electron used to generate the chemiosmotic gradient?
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03/27/19

How does cholesterol affect the fluidity of a plasma membrane?
I was previously taught that cholesterol affects the fluidity of a plasma membrane. At high temperatures, cholesterol decreases fluidity and at low temperatures cholesterol increases fluidity. The... more
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03/27/19

What causes swelling after impact?
Why does the head swell after getting hit by something hard? What is the liquid that forms after impact?
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03/27/19

Membrane Permeability to Pyruvate?
Pyruvate seems to pass easily through the outer membrane of the mitochondrion but has difficulty entering the inner membrane (and gets in by H+ symport). I have two questions: (1) what property of... more
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03/26/19

Is there a specific suffix for "within a cell"? i.e. in a similar manner to how -aemia refers to within the blood?
Words like hyperglycemia and hyponatremia refer to the relative level of each component in the blood, not in the cell. Is there a suffix for within the cell? For reference I would like one word as... more
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