Search found 5 matches

by Joker
Mon Apr 27, 2009 3:36 pm
Forum: Cell Biology
Topic: SAC thermoregulation
Replies: 0
Views: 3124

SAC thermoregulation

Hi there! I have a SAC tomorrow on thermoregulation (the practical). Would anyone would be able to answer a few questions that I might think of in preparation for the written work that is to be done during class time (day after tomorrow)? For SACs we usually just get a series of questions instead of...
by Joker
Mon Apr 27, 2009 8:03 am
Forum: Physiology
Topic: Insulin/glucagon Confusion
Replies: 2
Views: 4941

Insulin/glucagon Confusion

Is it true that insulin and glucagon are never both produced at the same time? Check out this site: m See page 4, last sentence. In my textbook, it shows a diagram where blood glucose level is above the normal range. It shows when this happens alpha cells secrete less glucagon and the beta cells pro...
by Joker
Sun Apr 26, 2009 9:07 am
Forum: Cell Biology
Topic: Definition of amphipathic
Replies: 2
Views: 4802

Definition of amphipathic

Is this right?

amphipathic: a molecule in which there is a difference in water solubility between one end and the other owing to differences in polarity.
by Joker
Wed Apr 15, 2009 10:21 am
Forum: Molecular Biology
Topic: Chloroplasts
Replies: 1
Views: 1644

Chloroplasts

If a test tube containing an aqueous suspension of chloroplasts is kept in the dark, what substances would you have to add to the suspension for a 3-carbon sugar phosphate molecule to be formed by photosyntheis? Explain.


Any help on the above will be appreciated!
by Joker
Wed Apr 15, 2009 9:59 am
Forum: Molecular Biology
Topic: Cyanide
Replies: 1
Views: 2756

Cyanide

Cyanide binds to an enzyme, cytochrome oxidase, preventing it from transferring electrons to the final acceptor molecule in aerobic cellular repiration. a) What is the final acceptor molecule? b) Where in the cell would cynanide target this enzyme? c) Explain why cyanide is such a fast acting poison...