Bio I Chapter 3
identify functions of atp
, drive energetically unfavorable chemical reactions, to power transport across membranes, power movement of cells
if a dna double helix is composed of 20% A, then what is the percentage of T
20%
which of the following are electron carriers in many important cellular processes
Nad+, FAD
which of the following is an accurate description of the structure of an unsaturated fatty acid
a hydrocarbon chain w/ a carboxyl group at one end and one or more double bonds between the carbon atoms
atp, fad, and nad+ all contain the nitrogenous base __ in their structure
adenine
which nitrogenous bases are present in rna
adenine, guanine, uracil, cytosine
which of the following molecules contains adenine, a 5-carbon sugar, and three phospagte groups
atp
which of the following molecules are composed of one or more nucleotides
atp, rna, nad+, dna
how is information stored in a molecule of dna
by varying the sequence of the four types of nucleotides that make up each strand
in a dna molecule, nitrogenous bases that pair up with each other are said to be which of the following
complementary
which sugar is found in the backbone of dna molecules
deoxyribose
transport forms of sugar are commonly made by linking 2 monosaccharides together to form a
disaccharide
which group of biomolecules is the most efficient for storing energy
fats and oils
which are lipids
fats, steroids, oils, terpenes
a phospholipid is structurally similar to a triglyceride except that a charged phosphate group replaces one of which of the following
fatty acids
what features of fats allows them to store high levels of energy
fatty acids contain long chains of c-h bonds
phospholipids always contain a __ becakbone to which 3 other groups/molecules are attached: one __ group, which is charged, and two long fatty acid chains, which are nonpolar
glycerol, phosphate
two strands of dna are bound together by __ bonds and then wrapped around a common axis to form a double helix
hydrogen
what types of bond keep the two strands of dna joined to each other
hydrogen
a liquid oil may be converted into a solid fat by which of the following processes
hydrogenation
which of the following statements about carbon are true
it can form covalent bonds, and it forms the framework biological molecules
what are lipids
lipids are hydrophobic molecules composed primarily of hydrogen and carbon
match fats, phospholipids, steroids, terpenes with its primary function in living organisms
long term energy storage, the main component of cell membranes, some function as hormones in animals, some are components of important biological pigments
a protein and notice that it contains two regions made of beta sheets connected by an alpha helix. this type of recurring structure that can be found in proteins w/ very different functions is called a
motif
phospholipid molecules spontaneously form bilayers. which of the following would be located in the interior of the bilayer
nonpolar regions, fatty acid tails, hydrophobic regions
information is stored in dna by varying the sequence of the four types of __ in each strand
nucleotides
which of the following is a characterisitc that all lipids share
they are largely insoluble in water
which of the following best describes the behavior of long chain lipids in water
they cluster together and expose what polar groups they do have to the surrounding water
which of the following statements about phospholipids is true
they have a polar head and two non polar tails
what describes phospholipids
they have polar head and 2 nonpolar tails, they spontaneously from micelles or bilayers in water, they consist of glycerol joined to two fatty acids and a phosphate group
during proper base pairing in dna, adenine pairs w/ __ and cytosine pairs w? __
thymine, guanine