問題一覧
1
at the 3’ end of a typical dna strand you will find what
hydroxyl group (-OH)
2
what do eukaryotes have that prokaryotes don’t?
a nucleus
3
hydrolysis is a process that uses what to break something?
water
4
DNA that is very rich in GC base pairs is harder to separate into two strands than one of the same length that is very AT rich
true
5
covalent bonds are likely to form between two atoms if
they can share electrons and in so doing both fill their outer shell
6
the reason water is able to form hydrogen bonds is that
oxygen is an electronegative atom
7
what term is used to describe something that repels water
hydrophobic
8
if a sample of DNA contains 23% thymine, what percentage of it will be cytosine
27%
9
what is a feature common to all lipids
they are hydrophobic
10
how big is the average protein in humans
500 amino acids
11
to which carbon is the base attached in deoxyribose
1’
12
if a double bond between carbon atoms is present in a molecule it means that this molecule is:
unsaturated
13
a reason why an ion is charged could be because
it has taken an electron from another atom
14
amino acids each have a unique biochemical property due to the
unique collection of atoms in their R group
15
the bases on opposite strands of DNA are held together by what kind of bond
hydrogen
16
which of these is an example of an organelle
mitochondria
17
proteins that cross the plasma membrane must have what within them
a region of hydrophobic amino acids
18
mitochondria and chloroplasts have their own genome and their own ribosomes inside. this is strong evidence that:
they were once free living bacteria
19
the amino acids within proteins are held together by ____ bonds
peptide
20
the primary structure of a protein is:
the linear sequence of amino acids
21
amylopectin and glycogen are both storage forms of what important molecule in plants and animals?
glucose
22
the miller urey experiment (about how life may have begun) demonstrated that:
molecules associated with life can be made in conditions found on the early earth
23
a major difference between RNA and DNA is
the presence of uracil, only in RNA
24
DNA is antiparallel, what does that mean?
in each molecule the two strands are running in opposite directions
25
in which kind of molecule do you expect to find a phosphodiester bond
DNA or RNA
26
which of these is a good description of phospholipids
they have a hydrophilic head connected to a pair of hydrophobic tails
27
which of these is a good design a major function of a membrane
they form a selective barrier around cells
28
how many covalent bonds can one carbon atom form with other atoms
4
29
solution A has a pH of 3. solution B has a pH of 4. which one has a higher concentration of H+ ?
A