Cell Definition and 899 Threads

For a project in AP Bio, I need to find out what kind of archetypal eukaryotic cell has a large amount of smooth er, a large amount of rough er, a moderate amount of mitochondria, no cilia, and a large amount of Golgi bodies? Thanks!

As it is said , if we hold the higher potential of a battery via a wire without touching the ground, some of the static electricity gets stored into us. Does that mean that the voltage of the higher potential reduces due to loss of charges.

What's a good comprehensive book for a high school student on biology that has never studied the subject before? (Campbell seems to be college/university-level so I can't touch that)

Liquid junction potential occurs when 2 solutions of different concentrations are in contact with each other. The more concentrated one would have tendency to diffuse faster comparitively than less concentrated. The rate of diffision depends on the mobility of ions. Weston cadmium cell is...

Hi! Recently, I got a hobby grade mini- fuel cell after watching a youtube video. Sometimes the fuel cell doesn't perform steadily. What effect does the surrounding air temperature have on PEMs? will it work better if i run in near an AC? (:wink:) I've seen some really complex images on...

Elements like Silicon, Germanium and Gallium can be used to make solar cells but platinum can not be used. What is the exact reason? Is it related to threshold frequency? Tried to search for the answer through many sources, but couldn't get a satisfactory one. Your views and answers are really...

I think in Multiple fusion daughter cells are different from parent cell.I interpreted this by looking at the image below Have I interpreted correctly?Is this image reliable?

Homework Statement Consider the following half reactions at 298 K Ni2+ + 2 e- → Ni Eo = -0.231 V Pb2+ + 2 e- → Pb Eo = -0.133 V A galvanic cell based on these half reactions is set up under standard conditions where each solution is 1.00 L and each electrode weighs exactly 100.0 g. What will...

Hello everybody, I would like to ask you a question about voltaic cells. Can any two electrodes from the table attached to this post make a voltaic cell? There will always be a potential difference no matter which half reactions you select. From my point of you, any two electrodes (or half...

I set up a zinc-copper elctrochemical cell by placing both electrodes in lemon juice to test the ability of lemon juice to conduct a current. I used a voltmeter and attached each lead to one of the metal electrodes. What I observed was that the voltage over time given on the voltmeter began to...

the period between two successive cell divisions is called ? according to the site below http://www.geekmcq.com/biology/cellcycle/discussion-7116 it's interphase and as per below site in question no 17 as we can see it is called generation time.And my teacher says generation time is same...

Homework Statement First question of this particular page http://www.hourlybook.com/ncert-questions-pmts-cell-cycle-cell-division/ Homework Equations the answer is given as C. The Attempt at a Solution But i didn't understand because in last phase i.e D dna content is again reduced to 2c.But...

Hello everyone! I have a thesis to design a temperature stabilizing(controlling) system for solar cells.I need to use 12V Peltier battery and a simple pc fan.Any further help is appreciated.

searching for my feasibility study thanks.in advance.

Hi my name is Patrick I have been trying to find new ways to power a hho generator in my car ,the problem is that yes you can have great mpg increase but you have to limit the amount of gas being produced ,to control the amount of amparge ,so it does not drag on alternator and thus decrease the...

protein synthesis in an animal cell takes place (a)in the cytoplasm as well as mitochondria (b)only on ribosome attached to nucleus (c)only in the cytoplasm (d)in the nucleolus as well as in the cytoplasm some sites suggest option (a)is correct and some site says option d is correct. Which is...

A plant cell is usually larger in size. An animal cell is comparatively smaller in size. 2. It cannot change its shape. An animal cell can often change its shape. 3. A mature plant cell contains a large central vacuole. An animal cell often possesses many small vacuoles. 4. Plastids are present...

Hello everyone. After googling my eyes out, the only hits I get are about people wondering how much to charge their cell phones. I'm looking for a more academic view point on this. My question is this... Cell Phones, like any device require power. I'd like to find out how many amps or miliamps...

To experiment on dehumidification

Hello, Apologies I am not an engineer. I am hoping to find the approximate size of a system that rotates at a torque of 0.6nm but a rotation per minute of 1rpm. Ideally this would run off of dry cell batteries (e.g. 6xAA). Roughly how big would the gear system be to drop the RPM for this? How...

Hey physics forums Do you know if you can cut this mono crystalline solar cell in half: https://www.amazon.com/gp/product/B00ISVLPN4/?tag=pfamazon01-20

good evening to all if two ideal cells with emf 6 volt and 3 volt are connected in parellel to supply current how the net emf can be decided

< Mentor Note -- thread moved to HH from the technical chemistryforum, so no HH Template is shown >[/color] I was given this problem: A voltaic sell uses the reaction 4Fe3+ + H2 --> 2Fe2+ +2H+. Find the cell potential when [Fe3+]=1.50 M, PH2=.50 atm, and [Fe2+]=.00100 M and the pH of both anode...

In our textbook it is written that -voltmeter measures the electrode potential difference between 2 half cells (in an electrochemical cell) (electrode potential refers to the potential difference between electrode and its salt solution in which it is dipped) it should come-voltmeter measures...

I was studying about dry cell and read that carbon(graphite) rod surrounded by MnO2 is used as cathode but when i read the chemical reaction equation at cathode given as : MnO2 + NH4+ + e - - - - > MnO(OH) +NH3 I nowhere found carbon... So where is it actually used? (i found this for mercury...

Imagine a ring of transformers and amplifiers connected together. The first transformer increases the voltage using 85% of the current. The amplifier then increases the remaining 15% for a higher current. The now higher current receives a higher voltage from the second transformer again only...

Why can't I find any LED's at 488nm? I am trying to find a cheaper light source than the traditional argon ion laser for a possible fluorescence activated cell sorter. See link below for schematic. Does anybody know a good retail site for lights in this spectrum I can't find good results with...

Hi , I want to know if the heart contains the nerve cell?

Hello, Just as the title asks, what sort of applications would series and parallel connections of Direct Methanol Fuel Cell suit the best? Based from my understanding of Fuel Cells and experimental results, one cell is not enough to power anything, hence they are used in stacks, in addition...

Extract From Wikipedia explaining zinc voltaic cell : metallic zinc at the surface of the zinc electrode is dissolving into the solution Can you explain what makes zinc atoms dissolve into the solution? Why are solid zinc atoms losing electrons?The solution is just a mix of Zn2+ and SO42-. Do Zn...

Homework Statement See attached image, assignment a) Homework EquationsThe Attempt at a Solution Using ordinary trigonometry, I got simply $$\Delta = sin(\theta_i) 2 d tan(\theta_t) n_{air} - 2n_{oxide} d/cos(\theta_t)$$. However, even if I apply Snell's law, it's not the answer I'm supposed to...

I am using the following formula to determine the lb load against the bottom of a load cell from tightening the bottom anchor bolt nut (which anchor bolt goes through the center of the load cell structure and anchors to a bottom base plate) to a certain torque force, plus adding a live static...

When I plug attempt to charge up my cell phone by plugging the cell phone charger in the cigarette outlet in my car, the cell phone charge icon will light up like it does when it is charging, but the charge on my battery will decrease fairly quickly at the same time. I suppose it's possible...

After spending some time doing a project on cancer I found out there are dozens of treatments abailable to at least decrease the cell divison in cancerous cells. Chemotherapy, radiotherapy and surgury. Each one divides into sub categories with tons of treatments available. After looking at lung...

While I was reading my notes on Electrochemistry, I found a cell attached to the main circuit in an electrolytic cell which perform electrolysis. What does this cell do there ? Does it create polarity on the platinum electrodes to attract the ions in the solution for oxidation or reduction or...

Photoelectrochemical Cell for water splitting with semi conducting photoanode (TiO2) and metal counter electrode (Pt). A photoelectrochemical cell under UV illumination generates a photocurrent. This photocurrent can be increased by applying an external bias because of improved exciton...

I have a load cell which must be placed onto a piece of vehicle structure. In an ideal world I would attach the load cell to the structure and calibrate both together to ensure a very accurate calibration, and that accurate loads are measured. However a problem arises if I need to replace the...

I just want to start by saying that I have found many questions very similar to this one using the search bar, but I still don't understand exactly what happens initially in a simple voltaic cell with a salt bridge (Daniel cell). For example, I am trying to figure out what initially happens in...

Life on Earth uses water as a solvent, but scientists have long speculated about the possibility of life existing in non-aqueous environments. Titan, Saturn's largest moon, has seas of liquid methane, and scientists at Cornell wanted to test whether structures similar to cell membranes could...

Well, I am confused on insulin resistance and cellular signaling. Know... Below is my understand: Insulin resistance happens either when the paceraes does not produce enough of the protein insulin and another way resistance occurs is when the receptor is not functioning properly. Are there...

Good day everyone, So I have a spare solar panel that has been laying around and I want to put it to use. Its a small panel, about 8"X12". The specs read 8 Watts and 17 Volts I was thinking of maybe making a solar charger for phones and other 5VDC USB devices. I bought a 5VDC regulator kit...

Hello, I have some questions regarding the nernst equation at open circuit voltage. We know E(OCV) = E0+ ln (PH2*PO2^0.5 / PH2O) I have some trouble with this: If I have dry gas (both for O2 and H2), and my circuit is open at 25°C and 1 atm I have no water in the circuit so what become the...

Hi, In exam, answering the question,"compare/differentiate between prokaryote and eukaryote cell." Should I write this in columns, writing the differences and comparing them? Or in paragraphs? Which is the right method? And can I include the significance about their differences? I mean, like...

Homework Statement :-I am confused about some lines in my textbook about galvanic cell[/B]Homework Equations :-The lines are as follows... The cell is connected to an external source of potential that opposes and exactly balance the cell potential . If the external potential is reduced...

How cathode is positively charged in voltaic cell?I mean at cathode reduction takes place ,but the electron which is gained for reduction comes from anode,than why cathode becomes positively charged ?As electrons are from anode not from cathode that means electrons are not lost by cathode ,so it...

What exactly is the concrete difference between those three?

Hello, Suppose sinosodial AC and pulsed DC magnetic fields with equal rms are applied on animal cells in the presence of magnetic nanoparticles. For the mean field strengths to be equal, the peak value of the square wave (with 50% duty cycles) must be sqrt. 2, which means that the maxiumum...

Are there any generally accepted techniques for maximizing cell phone reception with regards to phone orientation? When I search for this question on Google I get "answers" that seem more opinion than anything. Any engineers in the house with definitive experience with this topic and confident...

In as simple-to-understand language as possible, I'm having trouble wrapping my head around this ?:) Thank you in advance everyone.

Hi mates, I have to find solar cell efficiency by datas that given. These datas comes from an experiment in light and in dark. I found efficiency in light by square method with IV curve. But i don't know how to find in dark. The square method doesn't work cos data crossing the origin, no area to...