Search found 30 matches

by NewtoBiology
Sat Aug 22, 2009 1:47 pm
Forum: Cell Biology
Topic: What kind of cell is it? DUMB QUESTION
Replies: 1
Views: 4199

What kind of cell is it? DUMB QUESTION

Hello Biologists, I have stumbled across one of the dumbest questions that I have ever read. And the worst part, I CANT ANSWER IT! Q: you are studying protein synthesis in a cell. You have been able to determine very little about the process but have been able to determine that transcription and tra...
by NewtoBiology
Tue Aug 18, 2009 10:13 pm
Forum: Cell Biology
Topic: Anything beneficial to wrong nucleotide placement in DNA
Replies: 1
Views: 1822

Anything beneficial to wrong nucleotide placement in DNA

Hello biologists, I have just finished a chapter on DNA replication and the proof reading it engages in. I also studied about the different types proof reading the cell engages in to make sure that the DNA is correct. HOWEVER, despite the numerous checks present in the cell to prevent the placement ...
by NewtoBiology
Tue Aug 18, 2009 9:17 pm
Forum: Cell Biology
Topic: multiple initiation sites.
Replies: 5
Views: 7136

multiple initiation sites.

Hello Biologists, I have a question inwhich I am stuck on. I am still researching it but I am wondering if you could offer some assistance or information on a web site. Q: What are the two major reasons fo the multiple initiation sites for eukaryotic replication? A: REASON #1: I think that there are...
by NewtoBiology
Thu Aug 06, 2009 6:50 pm
Forum: Cell Biology
Topic: Which compartments of cell are associated with the following
Replies: 3
Views: 6284

Re: Which compartments of cell are associated with the following

Thank you for your help thus far, however I am still stuck on e. I know that bound signal recognition particles are associated with ribosomes, however what about unbound signal recognition particles... would it be correct to assume that they are associated with just cytoplasm???!?!? Thank you for yo...
by NewtoBiology
Thu Jul 23, 2009 12:00 am
Forum: Cell Biology
Topic: Which compartments of cell are associated with the following
Replies: 3
Views: 6284

Which compartments of cell are associated with the following

Hello Biologists, I am wondering if you could help me with two of the following: Q: Which compartments of a cell are associated with each of the following: a. clarthrin andsome vesicles: GOLGI COMPLEX b. calcium ions in the skeletal muscles: SARCOPLASTIC RETICULUM c. ribonuclease and lipase: ?????? ...
by NewtoBiology
Wed Jul 22, 2009 10:07 pm
Forum: Cell Biology
Topic: plasma membrane replentishing Question
Replies: 1
Views: 4412

plasma membrane replentishing Question

Hello biologists, Q: which of the following cells are most likely to be engaged in continually replacing membrane from its plasma membrane, and erythrocyte, a pancreatic acinar cell, or a macrophage? Why? A: I always try to do my own work first and then double check when I am totally confused. eryth...
by NewtoBiology
Wed Jul 15, 2009 11:40 pm
Forum: Molecular Biology
Topic: membrane permeability
Replies: 2
Views: 4752

membrane permeability

Hello Biologists, Q: Assume that the plasma membrane of a cell was suddenly permeable to the same degree to both Na+ and K+ and that teach responded to a concentration gradient of the same magnitude. Would you expect those two ions to move across the membrane at the same rates? Why or why not? I alw...
by NewtoBiology
Sat Jul 11, 2009 12:31 am
Forum: Molecular Biology
Topic: product-vs-time experiment of amylase
Replies: 3
Views: 3428

No, I just emailed my professor and he replied stated that those are the correct results. So now I am doubley as stumped..
by NewtoBiology
Fri Jul 10, 2009 9:24 pm
Forum: Molecular Biology
Topic: product-vs-time experiment of amylase
Replies: 3
Views: 3428

product-vs-time experiment of amylase

Hello Biologists, I was working with new enzymes (well new to me) today in a biochemistry lab and had to determine the velocity of the reaction for three different substrate conditions. Generally, when I plot the graphs, there are 3 different lines, corresponding to the different concentrations. How...
by NewtoBiology
Thu Jul 09, 2009 5:34 am
Forum: Molecular Biology
Topic: Lab of Vmax and KM
Replies: 1
Views: 4104

Lab of Vmax and KM

Hello Biologists, I conducted a lab today at school about the effect of substrate concentration on amylase activity. I recorded 28 points with [S] (mM) and V (mM/min). I subsequently plotted two graphs (a Michaelis-Menten and Lineweaver burk) and calculated the Vmax and Km. Vmax = 0.005033 mM/min KM...
by NewtoBiology
Wed Jul 08, 2009 2:09 am
Forum: Molecular Biology
Topic: Enzymes and activation energy.
Replies: 5
Views: 60109

Enzymes and activation energy.

Hello Biologists, Q: Enzymes greatly decrease the activation energy. Explain two of the way they do this and be specific in terms of chemical mechanisms. A: I have read my chapter 2 times, and have come up with the following answer. I must admit, I am stumped on the 'terms of chemical mechanisms' pa...
by NewtoBiology
Sun Jul 05, 2009 4:23 pm
Forum: Molecular Biology
Topic: DNA question.
Replies: 4
Views: 9272

DNA question.

Hello Biologists. I have a questions that has stumped me and I am hoping someone can offer some support. Q: DNA is isolated from two species. Both DNA samples are found to be of the same size (ie. equal quantities). The samples have G+C/A+T rations of 2.0 and 2.5 a. Which DNA samples has a higher G+...