234 Answered Questions for the topic Cell Biology

06/01/19

Do non-enzyme catalysed reaction pathways exist?
Can their be a kind of chemical reaction pathway in a cell, that is catalyzed or regulated but NOT necessarily by enzymes? I could not find anything on Google.I have almost no background in... more
Follows • 1
Expert Answers •1
Cell Biology Biology Homework Mitosis

05/30/19

Chromosome and chromatid numbers during cell cycle phases?
A diploid cell in G1 has 6 chromosomes. How many chromosomes and how many chromatids are present in each of the following stages?Here is what I am guessing- G1: 6 chromosomes ; 6 chromatids - G2:... more
Follows • 1
Expert Answers •2

05/30/19

Does polyploidy always isolate the polyploids from the diploid source population?
I am receiving conflicting information while researching polyploid speciation. On the one hand, some sources state that a polyploid can only reproduce sexually with polyploids having the same... more
Follows • 2
Expert Answers •2
Cell Biology Biology Cancer Mutations

05/30/19

Are there known downsides to removing UV mutation hotspots to prevent some skin cancers (Genetic sunblock)?
Khavari et al. recently demonstrated that a significant fraction of one of the major forms of skin cancer (cutaneous squamous cell carcinomas) are associated with a mutated KNSTRN gene (a protein... more
Follows • 1
Expert Answers •1

05/30/19

Why does alcohol cause the hemolysis of RBC in a large proportion?
I had today an experiment that we put 95% alcohol to the blood which made it completely transparent so hemolysis must have occurred.I started to think about the reasons.I think that this is because... more
Follows • 1
Expert Answers •1

05/29/19

Do strictly anaerobic organisms use metabolic reactions requiring oxygen?
When looking through genome annotations of strictly anaerobic organisms I see reactions featuring oxygen. I suspect these are likely an artifact of the annotation process. But I am wondering if it... more
Follows • 1
Expert Answers •1

05/29/19

Does the genome make sense without knowledge of the ovum?
Much of the literature for laypeople seems to consider (and to spreadthe idea) that an animal (or a plant, I guess) is characterised by itsgenome. I do not know whether the same goes for more... more
Follows • 1
Expert Answers •2
Cell Biology Biology

05/29/19

How do we look inside the cell?
My sister is in 9th grade biology and her teacher avoided answering the question of how we actually study the inside of a cell. I haven't taken biology in a while but I'd like to give her an... more
Follows • 1
Expert Answers •2
Cell Biology Biology Ribosome

05/29/19

Structure of mitochondrial ribosomes?
Is the ribosome found in mitochondrion and choloroplast formed of 30S and 50S subunits as in prokaryotes. I couldn't find any information on internet concerning it.The general wikipedia page has no... more
Follows • 1
Expert Answers •2

05/24/19

Why do flagella form a bundle only when they rotate counterclockwise during chemotaxis?
During Chemotaxis in bacteria with flagella, the flagellar rotation dictates how the cell moves. If the flagella rotate counterclockwise, then they form a bundle at one end of the cell (---O) and... more
Follows • 2
Expert Answers •1
Cell Biology Biology

05/24/19

What effects does being cryogenically frozen have on a person's body?
I'm wondering what effects are *known* to happen to a person's cells when a person is cryogenically frozen, especially those that need to be overcome in order to "bring them back to life."From a... more
Follows • 1
Expert Answers •1

05/24/19

Explanation of the terms "downstream signaling" and "upstream signaling"?
In molecular biology, what's the meaning of the terms "downstream signaling" and "upstream signaling"? What's the difference between them?
Follows • 1
Expert Answers •2
Cell Biology Biochemistry Physiology

05/24/19

What triggers meiosis in gonadal cells?
What specific biochemical processes are involved in inducing meiosis rather than mitosis? Why are gonadal cells the only cells in the human body which do undergo meiosis?
Follows • 1
Expert Answers •1

05/24/19

Excercise and fitness in old age?
I have seen so many news and study online, saying exercise keeps body healthy in old age and keeps us fit? how is this possible normal tear and wear will become more with activity hence more... more
Follows • 1
Expert Answers •1
Cell Biology Biology Cytoskeleton

05/24/19

Cytoskeleton made of only actin?
I am aware that the cytoskeleton has three structural components: actin, microtubules and intermediate filaments. I was wondering if any cell could possess a cytoskeleton made only of actin. Or... more
Follows • 1
Expert Answers •1

05/22/19

Could hydrogen replace oxygen in cellular respiration?
I was wondering what oxygen actually does in the body. I have seen a few answers to other questions that involve the electron chain and I am really not sure what that is. So I was wondering what... more
Follows • 1
Expert Answers •2

05/21/19

What is the difference between organelle membranes?
Cells and organelles are contained in [lipid bilayers](http://en.wikibooks.org/wiki/Structural_Biochemistry/Lipids/Lipid_Bilayer). I'm particularly interested in eukaryotic organelle bilayers and... more
Follows • 1
Expert Answers •1
Cell Biology Biology

05/17/19

Regarding TIMP and MMP enzymes?
Are there substances that can promote TIMP enzyme production, or MMP enzyme production or supression in tendons?Are there medical tests that measure quantities of MMP and TIMP enzymes in tendons?
Follows • 1
Expert Answers •1
Cell Biology Biology

05/16/19

How do we look inside the cell?
My sister is in 9th grade biology and her teacher avoided answering the question of how we actually study the inside of a cell. I haven't taken biology in a while but I'd like to give her an... more
Follows • 1
Expert Answers •1

05/15/19

Domains in cell membrane?
How is movement of proteins and lipids between different domains of cell membrane prevented?Why is the noncytosolic layer not able to do lateral movements between domains but cytosolic layer is... more
Follows • 1
Expert Answers •1

05/14/19

Why is ATP the preferred choice for energy carriers?
Why is ATP the most prevalent form of chemical energy storage and utilization in most cells?
Follows • 1
Expert Answers •1

05/13/19

Simple diffusion of lipid-soluble molecules through phospholipid bilayer -- does anything get "stuck" in transit?
It's a pretty elementary concept, and when I first learned of it I don't think I had the foundations to even think of such a question, but I found myself the other day thinking about the... more
Follows • 2
Expert Answers •3

05/12/19

True or False. Complex molecules (macromolecules) are made by joining smaller molecules together using dehydration synthesis.
Follows • 1
Expert Answers •1

05/12/19

Are there differences in cell membrane cholesterol levels between cell types?
With different cell types, and cell functions, are there distinct levels of cholesterol in each cell type's cell membrane, or do all cell types have a similar amount of cholesterol? I am assuming... more
Follows • 1
Expert Answers •2
Cell Biology Biochemistry Dna Rna

05/11/19

Why is thymine not incorporated into mRNA?
I am aware that in transcription uracil bonds to adenine and not thymine. But what is it that actually prevents thymine from bonding to adenine in transcription, that is not present in replication?
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.