Bio 111 exam 1
Terms in this set (17)
( 5.4) What amino acid sequence is denoted by G-W-M-V
Glycine- Tryptohan- Methionine-Valine
(5.5) Nucleic acids are polymers made up of what monomer?
To understand inheritance, we must understand (1.1) the molecular structure of DNA. This is an example of the application of which concept to the study of biology?
(1.2) Which branch of biology is concerned with the naming of organisms?
( 2.3) A covalent chemical bond is one in which____.
outer-shell electrons of two atoms are shared so as to satisfactorily fill their respective orbitals
(1.2) Darwins finches, collected from the Galapogos Islands, illustrates what?
descent with modification
(5.2) Humans can digest starch but not cellulose, why?
humans have enzymes that can hydrolyze the (alpha)-glycosidic linkages of starch but not the (beta)-glycosidic linkages of cellulose
(5.3) How do phospholipids interact with water molecules?
the polar heads interact with water, and the nonpolar tails do not
(3.1) The partial negative charge at one end of a water molecule is attracted to the partial negative charge of another water molecule. What is this attraction called?
a hydrogen bond
(5.4) Which one of the following is NOT a component of each monomer used to make proteins
a phosphorus atom, P
You have just sequenced a new protein found in mice and observed that the sulfur containing cysteine residues occur at regular intervals. What is the sig. of this finding?
cysteine residues are involved in disulfide bridges that help form tertiary structure
Thalidomide and L-dopa are examples of pharmaceutical drugs that occur as enantiomers, or molecules that___.
are mirror images of one another
Which two functional groups are always found in amino acids?
carboxyl and amino acids
about 25 of the 92 natural elements are known to be essential to life. Which 4 of these 25 elements make up apprx 96% of living matter?
carbon, hydrogen, nitrogen, oxygen
which class of biological molecules does NOT include polymers?
what best summarizes the relationship between dehydration reactions and hydrolysis?
Dehydration reactions assemble polymers, hydrolysis reactions break polymers apart.
Lactose, a sugar in milk, is composed of one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is the lactose classified?
as a disaccharide
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