FINAL EXAM Bio 121- Chapter 4
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Which theory states that all living things are composed of cells? - CORRECT ANSWER - cell
theory
Plants are susceptible to bacterial infections, which can damage their structure or even kill them.
Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
- CORRECT ANSWER - a drug that blocks gene expression in circular chromosomes
When using a microscope to view cells you obtained from scraping under your fingernails, you
notice that the cells lack nuclei; therefore, you conclude that the cells must be a type of
________ cell. - CORRECT ANSWER - prokaryotic
You find a cell of a type you have never seen before. The cell has both a nucleus and a cell wall.
Therefore, you conclude that it is likely to be a(n) ________ cell. - CORRECT ANSWER -
plant
Which of the following is a feature of prokaryotic cells but not eukaryotic cells? - CORRECT
ANSWER - pili
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells ______
prokaryotic cells. - CORRECT ANSWER - have membrane-enclosed structures called
organelles, which are lacking in
In eukaryotic cells, what name is given to the region between the nucleus and the plasma
membrane? - CORRECT ANSWER - cytoplasm
Which of the following is a function of the plasma membrane? - CORRECT ANSWER -
regulate the traffic of chemicals in and out of the cell
, ________ are the major lipids of plasma membranes. - CORRECT ANSWER - Phospholipids
The extracellular matrix of animal cells ________. - CORRECT ANSWER - protects and
support cells
When mixed with water, phospholipids spontaneously form membranes because they ______. -
CORRECT ANSWER - have hydrophilic phosphate groups that are attracted to water and
hydrophobic fatty acid tails that avoid water
The concept of a membrane as a fluid mosaic reflects the ability of ______. - CORRECT
ANSWER - phospholipids and most proteins to drift about in the plane of the membrane
The structural combination of DNA and protein forms ________. - CORRECT ANSWER -
chromatin
______ store the information necessary to produce proteins. - CORRECT ANSWER - genes
The nuclear envelope is composed of ______. - CORRECT ANSWER - a double membrane
Most human cells contain ______ chromosomes. - CORRECT ANSWER - 46
Which of the following structures manufactures the components of ribosomes? - CORRECT
ANSWER - nucleolus
Some ribosomes are suspended in the cytosol of a cell, whereas other ribosomes _______. -
CORRECT ANSWER - are attached to the outside of the nucleus
Where does protein synthesis take place? - CORRECT ANSWER - on ribosomes
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Which theory states that all living things are composed of cells? - CORRECT ANSWER - cell
theory
Plants are susceptible to bacterial infections, which can damage their structure or even kill them.
Which of the following would be the best antibiotic to treat a plant that is infected with bacteria?
- CORRECT ANSWER - a drug that blocks gene expression in circular chromosomes
When using a microscope to view cells you obtained from scraping under your fingernails, you
notice that the cells lack nuclei; therefore, you conclude that the cells must be a type of
________ cell. - CORRECT ANSWER - prokaryotic
You find a cell of a type you have never seen before. The cell has both a nucleus and a cell wall.
Therefore, you conclude that it is likely to be a(n) ________ cell. - CORRECT ANSWER -
plant
Which of the following is a feature of prokaryotic cells but not eukaryotic cells? - CORRECT
ANSWER - pili
One difference between eukaryotic and prokaryotic cells is that eukaryotic cells ______
prokaryotic cells. - CORRECT ANSWER - have membrane-enclosed structures called
organelles, which are lacking in
In eukaryotic cells, what name is given to the region between the nucleus and the plasma
membrane? - CORRECT ANSWER - cytoplasm
Which of the following is a function of the plasma membrane? - CORRECT ANSWER -
regulate the traffic of chemicals in and out of the cell
, ________ are the major lipids of plasma membranes. - CORRECT ANSWER - Phospholipids
The extracellular matrix of animal cells ________. - CORRECT ANSWER - protects and
support cells
When mixed with water, phospholipids spontaneously form membranes because they ______. -
CORRECT ANSWER - have hydrophilic phosphate groups that are attracted to water and
hydrophobic fatty acid tails that avoid water
The concept of a membrane as a fluid mosaic reflects the ability of ______. - CORRECT
ANSWER - phospholipids and most proteins to drift about in the plane of the membrane
The structural combination of DNA and protein forms ________. - CORRECT ANSWER -
chromatin
______ store the information necessary to produce proteins. - CORRECT ANSWER - genes
The nuclear envelope is composed of ______. - CORRECT ANSWER - a double membrane
Most human cells contain ______ chromosomes. - CORRECT ANSWER - 46
Which of the following structures manufactures the components of ribosomes? - CORRECT
ANSWER - nucleolus
Some ribosomes are suspended in the cytosol of a cell, whereas other ribosomes _______. -
CORRECT ANSWER - are attached to the outside of the nucleus
Where does protein synthesis take place? - CORRECT ANSWER - on ribosomes
