Biology - February 2007

2007-02-20 06:28:33 · 4 answers · asked by einstein52345 1

no additional details...

2007-02-20 06:10:53 · 5 answers · asked by .-=Rico ' Suave=-. 4

a) Analerotic reactions permit the TCA cycle to supply intermediates to biosynthetic pathways while maintaining the proper levels of cycle intermediates. Show the sequence of reactions which result in the net synthesis of citrate from pyruvate (one of which is a prominent example of an anaplerotic reaction).

b) When the rate at which the TCA cycle operates slows, the concentration of acetyl CoA increases. Specify the effect of this metabolite on the activity of pyruvate carboxylase, and discuss the metabolic advantages this affords the cell if i) the TCA cycle is slowed due to depletion of intermediates, or ii) the cycle is slowed due to an abudant energy supply (i.e., high [ATP], [NADH]).

i'm sorry but i don't get a clue wat's being asked. If anyone can explain and analyze this ill be grateful. I'm learning biochemistry and the professor that is teaching this is so hard. I'm reading text book but not much help. Plz help!!

2007-02-20 05:58:35 · 3 answers · asked by Ogenki_Desuka 1

i heard it was about six months, but i know your skin regenerates itself every 20-30 days.

but i want to get an idea for the whole entire body.

2007-02-20 05:52:00 · 2 answers · asked by autonomous1980 1

Is there a scientific explanation?

2007-02-20 05:49:32 · 5 answers · asked by Anonymous

2007-02-20 05:35:21 · 2 answers · asked by ? 6

Can someone tell me What biodiversity actually means and give me a example??

2007-02-20 05:32:04 · 5 answers · asked by lushay 2

A______ is a biological catalyst that can be found in the cells of your body

Melting sand into a thick liquid and molding it into different shapes is the process used to make _____.

_______ is the amount of time it takes for half of the atoms in a radioactive sample to decay

2007-02-20 05:06:38 · 9 answers · asked by curious 1

2007-02-20 04:54:21 · 4 answers · asked by tuthutop 2

2007-02-20 04:38:38 · 4 answers · asked by robyneddie2000 2

What do you believe?

2007-02-20 04:37:17 · 4 answers · asked by letmein20012001 1

My sister's in her first year of college. She tried to take biology, but on her 1st day, the teacher explained to the class that if they hadn't already taken chemistry, they would have a rough time in her biology class. My sister dropped the class a week later due to complete confusion. She then attempted chemistry, but also ended up dropping out of it within the 1st week since she never took chemistry or physics in high school; and doesn't even understand what an atom is! Yes, the school system has failed her, what to do now? I found that physics, since it's the basis for understanding the more abstract concepts introduced in chemistry and biology, would be the best starting point for her. But, physics (along with all sciences) requires lots of math. My sister's taking college algebra right now. My question is, what math courses/subjects are recommended to take/learn before taking a college physics course (assuming no prior chemistry or biology courses have been taken)? thanks

2007-02-20 04:11:50 · 13 answers · asked by World Expert 1

2007-02-20 04:06:07 · 1 answers · asked by Anonymous

1. the exchange of nutrients and gases between the blood and tissue cells is primary function of?....is it veins, ateries, aterioles, capillaries, or venules?.....

2. Which of the following organs wouldbe most likely to conatin fenestrated capillaries?..is it the spleen ,kidney, bone marrow, muscle, or pancreas. I think that one is Pancreas but im not sure. Please help me its ok if you dont know.

2007-02-20 03:45:27 · 6 answers · asked by Anonymous

I know you can get co-dominance, incomplete dominance... and so on.

But just take a simple dominant and reccesive allele; how does the cell know to express the dominant allele? I understand the genetics just not the physical goings on in a cell.

Help is greatly appreciated, cheers.

2007-02-20 03:40:46 · 3 answers · asked by life_aint_a_game_10 2

2007-02-20 03:34:13 · 4 answers · asked by pyaung g 2

2007-02-20 03:31:58 · 13 answers · asked by monkey kyle 2

2007-02-20 03:31:38 · 1 answers · asked by Moamen 1

Or does it only occur in glycolysis and krebs cycle?

2007-02-20 03:00:21 · 6 answers · asked by Green-Eyed Gal 7

I know tha DNA can with special mechanisms like histones. Could RNA undergo a similar process?

2007-02-20 02:43:06 · 2 answers · asked by Anonymous

2007-02-20 02:06:19 · 13 answers · asked by Anonymous

2007-02-20 01:50:31 · 9 answers · asked by Anonymous

2007-02-20 00:53:41 · 3 answers · asked by Anonymous

about cell membrane and cytoplasm

2007-02-20 00:27:00 · 4 answers · asked by paulina hp 1

2007-02-19 23:44:59 · 8 answers · asked by jamall69 2

2007-02-19 23:30:12 · 2 answers · asked by sLeepinGcoZz 1

2007-02-19 23:04:53 · 2 answers · asked by Anonymous

2007-02-19 23:01:58 · 11 answers · asked by fefe 4

2007-02-19 22:57:34 · 10 answers · asked by leonie m 1

2007-02-19 22:43:18 · 3 answers · asked by Dilip Patnaik 1