The er membrane is 2.5 nm thick. how many amino acids with mostly hydrophobic character does a protein have to have in a domain that can span the membrane as an alpha helix?

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

Agroup of students want to live a healthier life style they decide to use one of these following vegetable oils for cooking apex

Which organisms udergo photosynthesis