salazjlove
22.08.2019 •
Biology
What differentiates one amino acid from the other?
a) amino group
b) r group
c) peptide group
d) carbonyl group
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Ответ:
B) R group
Explanation: An aminoacid is composed by an amino group, an acid or carbonyl group and a side chain or R group, all bonded to a central carbon atom. Aminoacids are different between them for the R group and can be classified as: 1) Non-polar Neutral if the side chain is uncharged and non-polar (aliphatic or cyclic). 2) Polar Neutral if the side chain contains amida, sulfur or hydroxyl groups. 3) Basic if the side chain contains other amino groups. 4) Acid if the side chain contains other carboxyl groups.
Ответ:
C. The force transfers energy to or from the object.
Explanation:
Force doesn't change the mass of an object so A is not correct.
Force acting on an object will cause a change in the object, whether noticeable or not. Therefore B is not correct.
Force does not increase or decrease the weight of an object so D is also incorrect.