Bio 121 Exam 2 UPDATED ACTUAL Exam
Questions and CORRECT Answers
What cellular structure do antibiotics typically target?
(A) mitochondria
(B) cell walls
(C) cell membranes
(D) vacuoles - CORRECT ANSWER - Cell wall
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells ______
prokaryotic cells.
(A) have DNA, which is lacking in
(B) have a plasma membrane, which is lacking in
(C) have membrane-enclosed structures called organelles, which are lacking in
(D) have a nucleoid region, which is lacking in - CORRECT ANSWER - have membrane-
enclosed structures called organelles, which are lacking in
The microscope best for viewing living cells at low levels of magnification is the ________.
(A) light microscope
(B) transmission electron microscope
(C) scanning electron microscope - CORRECT ANSWER - Light Microscope
In eukaryotic cells, what name is given to the region that surrounds organelles but is not found
inside the nucleus?
(A) phospholipid bilayer
,(B) cytoplasm
(C) nucleoid
(D) chloroplast - CORRECT ANSWER - Cytoplasm
Which is a feature of prokaryotic cells but NOT eukaryotic cells?
(A) flagella
(B) ribosomes
(C) fimbriae
(D) cell wall - CORRECT ANSWER - Fimbriae
The extracellular matrix of animal cells ________.
(A) is a warehouse for the storage of extra lipids and carbohydrates
(B) is primarily a site of dead matter and waste materials
(C) protects and support cells
(D) provides avenues for the exchange of DNA - CORRECT ANSWER - protects and
support cells
________ are the major lipids of plasma membranes.
(A) Fats
(B) Steroids
(C) Phospholipids - CORRECT ANSWER - Phospholipids
The concept of a membrane as a fluid mosaic reflects the ability of ________.
(A) phospholipids but not proteins to drift about in the plane of the membrane
, (B) phospholipids and most proteins to drift about in the plane of the membrane
(C) carbohydrates to drift into and out of the membrane
(D) most proteins but not phospholipids to drift about in the plane of the membrane - CORRECT
ANSWER - phospholipids and most proteins to drift about in the plane of the membrane
When mixed with water, phospholipids spontaneously form membranes because they ________.
(A) have hydrophilic phosphate groups that are attracted to water and hydrophobic fatty acid tails
that avoid water
(B) have hydrophilic fatty acid tails that are attracted to water and hydrophobic phosphate groups
that avoid water
(C) have hydrophilic heads that are attracted to their hydrophobic tails - CORRECT
ANSWER - have hydrophilic phosphate groups that are attracted to water and hydrophobic
fatty acid tails that avoid water
Which is a function of the plasma membrane?
(A) regulate production of proteins in the cell
(B) regulate traffic of chemicals in and out of the cell
(C) regulate transport of DNA in and out of the nucleus
(D) regulate production of lipids in the cell - CORRECT ANSWER - regulate traffic of
chemicals in and out of the cell
The nuclear envelope is composed of ______.
(A) a double membrane
(B) DNA
(C) chromatin
(D) carbohydrates - CORRECT ANSWER - a double membrane
Questions and CORRECT Answers
What cellular structure do antibiotics typically target?
(A) mitochondria
(B) cell walls
(C) cell membranes
(D) vacuoles - CORRECT ANSWER - Cell wall
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells ______
prokaryotic cells.
(A) have DNA, which is lacking in
(B) have a plasma membrane, which is lacking in
(C) have membrane-enclosed structures called organelles, which are lacking in
(D) have a nucleoid region, which is lacking in - CORRECT ANSWER - have membrane-
enclosed structures called organelles, which are lacking in
The microscope best for viewing living cells at low levels of magnification is the ________.
(A) light microscope
(B) transmission electron microscope
(C) scanning electron microscope - CORRECT ANSWER - Light Microscope
In eukaryotic cells, what name is given to the region that surrounds organelles but is not found
inside the nucleus?
(A) phospholipid bilayer
,(B) cytoplasm
(C) nucleoid
(D) chloroplast - CORRECT ANSWER - Cytoplasm
Which is a feature of prokaryotic cells but NOT eukaryotic cells?
(A) flagella
(B) ribosomes
(C) fimbriae
(D) cell wall - CORRECT ANSWER - Fimbriae
The extracellular matrix of animal cells ________.
(A) is a warehouse for the storage of extra lipids and carbohydrates
(B) is primarily a site of dead matter and waste materials
(C) protects and support cells
(D) provides avenues for the exchange of DNA - CORRECT ANSWER - protects and
support cells
________ are the major lipids of plasma membranes.
(A) Fats
(B) Steroids
(C) Phospholipids - CORRECT ANSWER - Phospholipids
The concept of a membrane as a fluid mosaic reflects the ability of ________.
(A) phospholipids but not proteins to drift about in the plane of the membrane
, (B) phospholipids and most proteins to drift about in the plane of the membrane
(C) carbohydrates to drift into and out of the membrane
(D) most proteins but not phospholipids to drift about in the plane of the membrane - CORRECT
ANSWER - phospholipids and most proteins to drift about in the plane of the membrane
When mixed with water, phospholipids spontaneously form membranes because they ________.
(A) have hydrophilic phosphate groups that are attracted to water and hydrophobic fatty acid tails
that avoid water
(B) have hydrophilic fatty acid tails that are attracted to water and hydrophobic phosphate groups
that avoid water
(C) have hydrophilic heads that are attracted to their hydrophobic tails - CORRECT
ANSWER - have hydrophilic phosphate groups that are attracted to water and hydrophobic
fatty acid tails that avoid water
Which is a function of the plasma membrane?
(A) regulate production of proteins in the cell
(B) regulate traffic of chemicals in and out of the cell
(C) regulate transport of DNA in and out of the nucleus
(D) regulate production of lipids in the cell - CORRECT ANSWER - regulate traffic of
chemicals in and out of the cell
The nuclear envelope is composed of ______.
(A) a double membrane
(B) DNA
(C) chromatin
(D) carbohydrates - CORRECT ANSWER - a double membrane
