Blackboard Practice Quiz One

Question 1

When proteins fruits, hydrogen bonds form between the amino groups and carboxyl groups found in amino acids what level of protein structure is usually attributed to the specific kinds of interactions?

A) primary
B) secondary
C) tertiary
D) quaternary
E) more than one

Answer 1

B secondary

Question 2

Which of the following is true about non-polar covalent bonds found in many biological molecules?
A)They are found in the hydrocarbon tales of phospholipids
B)The atoms is involved in these bonds tend to have similar electronegativity values
C)The electrons involved in the bond are shared unequally, resulting in a separation of charge is between the atoms
D)A and B are true statements
E)B and C are true statements

Answer 2

D a and b are true

Question 3

What do prokaryotic and eukaryotic organisms have in common?
A)They synthesize DNA on ribosomes
B)They utilize carbohydrates, proteins, DNA, and lipids to build cellular structures
C)DNA is stored in the nucleus
D)Their cells contain the walls
E)More than one of the above statements is correct

Answer 3

A

Question 4

The tertiary of structure of a protein is the
A)Bonding of several protein chains into a complex
B)Sequence of amino acids with in the protein chain
C)Connection of amino acids through peptide bonds
D)Unique shape of the final folded proteins
E) Organization of the protein into an alpha helix or be plated sheet

Answer 4

D) Unique shape

Question 5

Which of the following would be most appropriate for observing the inside of a mitochondria?
A) transmission electron microscope
B)Light microscope
C)Unaided a human eye
D) Magnifying microscope
E)We are on able to see the structures inside of a mitochondria

Answer 5

A) transmission electron microscope

Question 6

The 20 different amino acids found in polypeptides exhibit different chemical and physical properties because of different
A) carbonyl groups
B) amino groups
C) side chains (R groups)
D) tertiary structure 
E) more than one is true

Answer 6

C side chains (r groups)

Question 7

The enzyme amylase is able to break down starch but not cellulose. Why might this be the case?
A)Starch is a polymer of glucose will cellulose is constructed using other sugars
B) Cellulose molecules are too large for amylase to function
C)The glucose rings and cellulose are different in those and start causing them to form slightly different bonds
D)The enzyme can’t recognize cellulose because of its helical shape
E)The bonds between sugars and cellulose so much stronger

Answer 7

C) The glucose rings and cellulose are different than those in starch causing them to form a slightly different bonds

Question 8

Chloramphenicol is a drug that and inhibits the activity of prokaryotic ribosomes. Which of the following might also have protein synthesis in inhibited it if they were in the presence of chloramphenicol?
A)mitochondria
B)chloroplast
C)peroxisome
D)a and b
E)all of the above

Answer 8

A and b

Question 9

The tertiary structure of a protein is the
A)Bonding of several proteins into a complex
B)Sequence of amino acids with in the protein chain
C)Organization of protein into an alpha helix or be pleated sheet
D)Connection of amino acids through peptide bonds
E)Unique shape of the final folded proteins

Answer 9

E – the unique shape of the final folded proteins

Question 10

The DNA in coding a protein has been mutated, but surprisingly the protein is still functional. Why might this be the case?
A)The primary structure of the protein was not changed
B)The mutation resulted in one hydrophobic amino acid being replaced with another
C)The mutation did not affect the protein shape or structure
D)A and C are both correct
E)All of the above statements are true

Answer 10

E – all of the above statements are true

Question 11

A hydrophobic amino acid our group would be found where in a protein?
A) on the inside of the chain away from water
B)only at one end of the protein chain
C) forming a peptide bond with the next aa
D)forming hydrogen bonds with other R groups
E)on the outside of the chain in the water

Answer 11

On the inside of the folder chain away from water

Question 12

Which of the following activities involve the smooth endoplasmic reticulum?
A)Protein synthesis
B)Membrane recycling
C)DNA replication
D)Energy production
E)Cell division

Answer 12

Membrane recycling

Question 13

The alpha helix and beta a pleated sheet are both common forms found in which level of structure of proteins
A)Secondary
B)Primary
C)Tertiary
D)Quaternary
E)More than one kind of protein structure

Answer 13

Secondary

Question 14

Which of the following best summarizes the relationship between condensation/dehydration reactions and hydrolysis?
A)Condensation reactions assemble polymers and hydrolysis breaks them down
B)Hydrolysis creates monomers and condensation reactions destroy monomers
C)Condensation reactions occur in plants and hydrolysis happens in animals
D)Condensation reactions can occur only after hydrolysis
E)Condensation reactions act on lipids well hydrolysis happens in proteins

Answer 14

Condensation reactions a simple polymers and hydrolysis brakes polymers down

Question 15

Which of the following is not an enclosed by a double membrane?
A)Mitochondria
B)Lysosome
C)Chloroplast
D)Nucleus
E)All of the above have a double membrane’s

Answer 15

Lysosome

Question 16

What do cells of all living organisms have in common?
A)Mitochondria, plasma membrane, ribosomes
B)Plasma membrane, cell wall, chromosome
C)Chromosome, ribosomes, plasma membrane
D)Chromosome, mitochondria, cell wall
E)Ribosomes, plasma membrane, cell wall

Answer 16

C – chromosomes, ribosomes, plasma membrane

Question 17

Which of the following would not be found in a prokaryotic cells: 
A)Dna
B)membranes
C)cytosol
D)ribosome
E)nucleus

Answer 17

Nucleus

Question 18

Large organic molecules are usually assembled by polymerization of similar or identical simple subunits. Which of the following is an exception to the above statement?
A)Steroid
B)Cellulose
C)DNA
D)And enzyme
E)A membrane proteins

Answer 18

A steroid

Question 19

Which of the following cellular structures is not a part of the Endo membrane system?
A) Mitochondria
B)Endoplasmic reticulum
C)Vesicles
D)Lysosome
E)Golgi complex

Answer 19

The mitochondria

Question 20

Which of the following is true of both starch and cellulose
A)They are both polymers of glucose
B)They are both polymers of a combination of glucose and fructose
C)They can both be digested by humans
D)They are both used for energy storage in plants
E)They are both structural components of the plant cell wall

Answer 20

They are both polymers of glucose

Question 21

Which of the following statements about saturated fatty acid’s is true
A)They are predominate in olive oil
B) They are usually liquid at room temperature
C)They have double bonds between carbon atoms a fatty acids
D)They are usually produced by plants
E)They have a higher ratio of hydrogen to carbon then do unsaturated fatty acid’s

Answer 21

Not c

Question 22

Which of the following statements about prokaryotic’s is true?
A)They are multicellular organisms
B)They do not have cell walls
C)They evolved from eucaryotic cells
D)They do not have cellular organelles
E)I do not have membranes

Answer 22

They do not have cellular organelles

Question 23

Polymers of proteins are synthesized from monomers by
A)Connecting amino acids together
B)The addition of water as each monomer is added
C)The removal of water, dehydration/condensation reaction
D)A and C
E)A and B

Answer 23

A and C are both correct

Question 24

Which of the following is true of both mitochondria and chloroplasts?
A)They both contain grana
B)They both arose from an Endo symbiotic event
C)They were both created by in folding of l cellular plasma membrane
D)They are both enclosed by a single plasma membrane
E) More than one is true

Answer 24

They both arose from an Endo symbiotic event

Question 25

Which of the following statements provide support for the Endo symbiotic theory?
A)Mitochondria and chloroplasts are the same size as the nucleus in eucaryotic cells
B)Mitochondria and chloroplasts are surrounded in the lipid bilayer
C)Mitochondria and chloroplasts are able to make some of their own proteins
D)Mitochondria and chloroplasts each have specialized functions
E)Mitochondria and chloroplasts can survive if removed from a cell

Answer 25

Mitochondria and chloroplasts are able to make some of their own proteins

Question 26

Which of the following is true about hydrophilic molecules
A)Fatty acids are typical examples of hydrophilic molecules

B)They dissolve in water due to the formation of hydrogen bonds

C)They may contain functional groups such as hydroxyl or carboxyl
D)a and b are correct
E)B and c are correct

Answer 26

B and c are correct statements: they dissolve in water due to the formation of hydrogen bonds and they may contain functional groups such as hydroxyl or carboxyl