bio exam 1

29問 • 2年前

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問題一覧

at the 3’ end of a typical dna strand you will find what

hydroxyl group (-OH)

what do eukaryotes have that prokaryotes don’t?

a nucleus

hydrolysis is a process that uses what to break something?

water

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

covalent bonds are likely to form between two atoms if

they can share electrons and in so doing both fill their outer shell

the reason water is able to form hydrogen bonds is that

oxygen is an electronegative atom

what term is used to describe something that repels water

hydrophobic

if a sample of DNA contains 23% thymine, what percentage of it will be cytosine

27%

what is a feature common to all lipids

they are hydrophobic

how big is the average protein in humans

500 amino acids

to which carbon is the base attached in deoxyribose

1’

if a double bond between carbon atoms is present in a molecule it means that this molecule is:

unsaturated

a reason why an ion is charged could be because

it has taken an electron from another atom

amino acids each have a unique biochemical property due to the

unique collection of atoms in their R group

the bases on opposite strands of DNA are held together by what kind of bond

hydrogen

which of these is an example of an organelle

mitochondria

proteins that cross the plasma membrane must have what within them

a region of hydrophobic amino acids

mitochondria and chloroplasts have their own genome and their own ribosomes inside. this is strong evidence that:

they were once free living bacteria

the amino acids within proteins are held together by ____ bonds

peptide

the primary structure of a protein is:

the linear sequence of amino acids

amylopectin and glycogen are both storage forms of what important molecule in plants and animals?

glucose

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

a major difference between RNA and DNA is

the presence of uracil, only in RNA

DNA is antiparallel, what does that mean?

in each molecule the two strands are running in opposite directions

in which kind of molecule do you expect to find a phosphodiester bond

DNA or RNA

which of these is a good description of phospholipids

they have a hydrophilic head connected to a pair of hydrophobic tails

which of these is a good design a major function of a membrane

they form a selective barrier around cells

how many covalent bonds can one carbon atom form with other atoms

solution A has a pH of 3. solution B has a pH of 4. which one has a higher concentration of H+ ?

bio exam 2

bio exam 2

bio exam 3

bio exam 3

bio exam 4

bio exam 4

問題一覧

at the 3’ end of a typical dna strand you will find what

hydroxyl group (-OH)

what do eukaryotes have that prokaryotes don’t?

a nucleus

hydrolysis is a process that uses what to break something?

water

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

covalent bonds are likely to form between two atoms if

they can share electrons and in so doing both fill their outer shell

the reason water is able to form hydrogen bonds is that

oxygen is an electronegative atom

what term is used to describe something that repels water

hydrophobic

if a sample of DNA contains 23% thymine, what percentage of it will be cytosine

27%

what is a feature common to all lipids

they are hydrophobic

how big is the average protein in humans

500 amino acids

to which carbon is the base attached in deoxyribose

1’

if a double bond between carbon atoms is present in a molecule it means that this molecule is:

unsaturated

a reason why an ion is charged could be because

it has taken an electron from another atom

amino acids each have a unique biochemical property due to the

unique collection of atoms in their R group

the bases on opposite strands of DNA are held together by what kind of bond

hydrogen

which of these is an example of an organelle

mitochondria

proteins that cross the plasma membrane must have what within them

a region of hydrophobic amino acids

mitochondria and chloroplasts have their own genome and their own ribosomes inside. this is strong evidence that:

they were once free living bacteria

the amino acids within proteins are held together by ____ bonds

peptide

the primary structure of a protein is:

the linear sequence of amino acids

amylopectin and glycogen are both storage forms of what important molecule in plants and animals?

glucose

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

a major difference between RNA and DNA is

the presence of uracil, only in RNA

DNA is antiparallel, what does that mean?

in each molecule the two strands are running in opposite directions

in which kind of molecule do you expect to find a phosphodiester bond

DNA or RNA

which of these is a good description of phospholipids

they have a hydrophilic head connected to a pair of hydrophobic tails

which of these is a good design a major function of a membrane

they form a selective barrier around cells

how many covalent bonds can one carbon atom form with other atoms

solution A has a pH of 3. solution B has a pH of 4. which one has a higher concentration of H+ ?