Biology - February 2007

Why is it important for the cell to maintain a semipermeable membrane?

2007-02-05 12:02:46 · 3 answers · asked by skoolgirl 1

2007-02-05 12:02:20 · 2 answers · asked by Anonymous

I would like to know what is the process to make our blood warm that "cold blooded" animals don't have. I would like to know the systems involved. Thanks!

2007-02-05 12:01:00 · 1 answers · asked by Brujis 2

2007-02-05 12:00:31 · 3 answers · asked by Anonymous

2007-02-05 11:57:36 · 1 answers · asked by tothethirdworld 1

1.It is the ratio of cell surface to cell volume that imposes upper limits on cell size.
In your discussion, describe the effect of cell size on surface area and cite an example of functional advantage to a small cell size.

2007-02-05 11:56:25 · 3 answers · asked by Tori T 1

I have to create a combination photoessay/term paper by the end of the year....

the project's premise is to compose a project addressing a global biological or health problem...
the only problem is i'm having some trouble coming up with ideas for my project..... Any ideas out there??

thanks!

2007-02-05 11:35:08 · 2 answers · asked by Anonymous

2007-02-05 11:33:54 · 1 answers · asked by cooldude5611901 2

2007-02-05 11:28:51 · 12 answers · asked by Luiki 1

Why does the oxygen kill bacteria that are found in an oxygen atmosphere?

2007-02-05 11:11:12 · 4 answers · asked by Brit 1

2007-02-05 11:08:45 · 2 answers · asked by Aaron F 2

The famous scientist Willy Nohwit had a great fondness for Yu-Gi-Oh cards (one of those monster card games), but decided to see if he could make some money making a similar set of cards, using enzymes instead of monsters. Each card would have the name of an enzyme, along with it’s Vmax and Km (instead of a monsters attack and defense).

His favorite card was an enzyme with the made-up name of Mega-zyme.
This enzyme had a Vmax of 1200 mM product/min and a Km of 200 mM

a) What would be the rate of this enzyme when the substrate concentration is 200 mM? Why?

b) In the presence of an opposing inhibitor card, the Megazyme has a Vmax of only 800 mM, while its Km remains at 200mM. What kind of inhibition is this? Why?

c) In the absence of any inhibitor, could any concentration of substrate ever generate a rate of 2000 mM product/min in this enzyme? Why?

2007-02-05 11:08:05 · 2 answers · asked by Pontiac S 1

What are the similarities and differences between monosaccharides, disaccharides, polysaccharides?

2007-02-05 11:07:54 · 3 answers · asked by Bella Vega 1

I've looked on Google, Yahoo, and Ask, but cannot find any answers.

2007-02-05 11:03:19 · 5 answers · asked by Shelb-N-Ator [[H!ATD]] 3

2007-02-05 10:47:44 · 3 answers · asked by scrchic00 2

2007-02-05 10:45:37 · 6 answers · asked by smashbrolover 1

It just seems to me that guys don't have any use for nipples.Not that I don't think that guys should have nipples or anything.

2007-02-05 10:26:46 · 12 answers · asked by Anonymous

ribosomal proteins
mRNA
rRNA
Anticodons

2007-02-05 10:14:33 · 3 answers · asked by Your Mom 1

Thanks again

2007-02-05 10:05:48 · 1 answers · asked by Anonymous

2007-02-05 09:45:39 · 3 answers · asked by live.laugh.love 3

You know how scientists say we only use a certain percentage of our brains? And that our brain is a certain size? Our brains size is what it is including the sections we don't use. How big would our brains be if the percentage we used is100% of our brain?

2007-02-05 09:30:11 · 7 answers · asked by Anonymous

I have found out what the bacterium is called, but no article I have read states as to why researchers use it- just states that they use it. It wasn't much of a help. :(

2007-02-05 09:28:27 · 3 answers · asked by Your Mom 1

I am trying to figure out the complete strand but I can't find anything online or in my book that explains how you would go about figuring it out. Please someone give me an example so I can figure this out on my own.

2007-02-05 09:25:30 · 6 answers · asked by Your Mom 1

the peas are germinating...Will the rate of cellular respiration increase when the germinating time increas?

2007-02-05 09:20:20 · 2 answers · asked by Anonymous

2007-02-05 09:10:45 · 9 answers · asked by katiebug11304 1

Viral Name: Chicken Pox
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

5.) Viral Name: Small Pox
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

Thanks for any help-

2007-02-05 08:50:09 · 3 answers · asked by Anonymous

Have tried to reserach this for several hours. I must be missing something so simple.

2007-02-05 08:28:33 · 2 answers · asked by redqueen94 2

Please help me out with this if you can just fill in the missing parts if you know anything I'm still trying to look for them myself.
1.) Viral Name: Influenza
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

2.)Viral Name: HIV
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

3.) Viral Name: West Nile
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

4.) Viral Name: Chicken Pox
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

5.) Viral Name: Small Pox
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

6.) Viral Name: Ebola
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?

7.) Viral Name: Avian (Bird flue)
DNA or RNA : ?
Transmission : ?
Symptoms : ?
Interesting Fact : ?


Please help-
Thanks A Bunch Ashley-

2007-02-05 08:28:06 · 5 answers · asked by Anonymous

If the frequency of p = 0.8, what is the frequency of the heterozygous genotype?

2007-02-05 08:15:44 · 1 answers · asked by mike 1

2007-02-05 08:12:49 · 6 answers · asked by gsrvtecny 1