BIOLOGY 109 MIDTERM EXAM
QUESTIONS AND ANSWERS
Fats composed of fatty acids that have double bonds in the fatty acids and have
fewer than the maximum number of hydrogen atoms are - ANSWER-Liquids at room
temperature
The sugar found in RNA is - ANSWER-Ribose
The carbohydrate that is found in plant cell walls is - ANSWER-Cellulose
Select the membrane molecule that is made up of a polar region with two non polar
fatty acid tails - ANSWER-Phospholipids
Choose the membrane molecule responsible for aiding passed of polar molecules
into and out of the cell. - ANSWER-Transmembrane proteins
The simplest cells are the - ANSWER-Prokaryotic bacteria
The nucleus of the eukaryotic cell functions - ANSWER-All of the choices are correct
(to house the nucleolus, contain protein synthesis instructions, to store the cell's
hereditary information, as the common center for the cell)
An extensive system of internal membranes, called the _________, is where
carbohydrates and lipids are manufactured, and proteins are made that will be
exported from the cell. - ANSWER-Endoplasmic reticulum
Two organelles that are thought to have once been free-living bacterial cells are
_________ and ________. - ANSWER-Chloroplasts; mitochondria
Oxidative metabolism takes place in the ________ of the cell. - ANSWER-
Mitochondria
One organelle, called a ___________, contains enzymes that digest worn out parts
of the cells. - ANSWER-Lysosome
Cilia and flagella differ from each other primarily in - ANSWER-Length
When a cytoplasmic vesicle fuses with the plasma membrane, expelling its contents
outside the cell, the process is known as - ANSWER-Exocytosis
When molecules move through a cell membrane from an area of greater
concentration to an area of lesser concentration by way of a channel protein, it is
called - ANSWER-Facilitated diffusion
A solution with a pH of 4 has _____ the concentration of H+ present compared to a
solution with a pH of 5 - ANSWER-10 times
, If an element has an atomic number of 6 and a mass number of 14, how many
neutrons does it have? - ANSWER-8
A substance that is considered a strong base has a pH value of - ANSWER-12
Which level of protein structure ultimately determines all the other levels of
structure? - ANSWER-Primary
When a protein is composed of more than one polypeptide chain, the arrangement of
the chains is called the ________ structure. - ANSWER-Quaternary
All enzymes are - ANSWER-Proteins
Which polymer serves as the information storage molecule for cells? - ANSWER-
Nucleic acids
If one strange is CCAATTG on DNA then the complementary chain is - ANSWER-
GGTTAAC
The bases of the two DNA chains are linked in the middle of the molecule by ____
bonds. - ANSWER-Hydrogen
The external skeleton of many invertebrates is made of - ANSWER-Chitin
Which is incorrect about the plasma membrane? - ANSWER-Proteins embedded in
the lipid bilayer do not move.
Which of the following kingdoms are prokaryotes? - ANSWER-Archaea
Which of the following is not an organelle? - ANSWER-Ribosome
Which of the following is a specialized type of vesicle? - ANSWER-Lysosome
If a paramecium's contractile vacuole stops working, what might happen to the
organism? - ANSWER-It would fill with water and may burst
Which of the following is found in plant cells but not animal cells? - ANSWER-Central
vacuole
Which of the following is NOT a type of cytoskeletal fiber? - ANSWER-Pili
Which process would enable a white blood cell to ingest a bacteria? - ANSWER-
Phagocytosis
When a cell membrane engulfs fluid droplets it is called - ANSWER-Pinocytosis
Which of these is an electron carrier molecule? - ANSWER-NAD+
The first stage of cellular respiration, called ________, takes place in the cytoplasm
of the cell and needs no oxygen. - ANSWER-Glycolysis
QUESTIONS AND ANSWERS
Fats composed of fatty acids that have double bonds in the fatty acids and have
fewer than the maximum number of hydrogen atoms are - ANSWER-Liquids at room
temperature
The sugar found in RNA is - ANSWER-Ribose
The carbohydrate that is found in plant cell walls is - ANSWER-Cellulose
Select the membrane molecule that is made up of a polar region with two non polar
fatty acid tails - ANSWER-Phospholipids
Choose the membrane molecule responsible for aiding passed of polar molecules
into and out of the cell. - ANSWER-Transmembrane proteins
The simplest cells are the - ANSWER-Prokaryotic bacteria
The nucleus of the eukaryotic cell functions - ANSWER-All of the choices are correct
(to house the nucleolus, contain protein synthesis instructions, to store the cell's
hereditary information, as the common center for the cell)
An extensive system of internal membranes, called the _________, is where
carbohydrates and lipids are manufactured, and proteins are made that will be
exported from the cell. - ANSWER-Endoplasmic reticulum
Two organelles that are thought to have once been free-living bacterial cells are
_________ and ________. - ANSWER-Chloroplasts; mitochondria
Oxidative metabolism takes place in the ________ of the cell. - ANSWER-
Mitochondria
One organelle, called a ___________, contains enzymes that digest worn out parts
of the cells. - ANSWER-Lysosome
Cilia and flagella differ from each other primarily in - ANSWER-Length
When a cytoplasmic vesicle fuses with the plasma membrane, expelling its contents
outside the cell, the process is known as - ANSWER-Exocytosis
When molecules move through a cell membrane from an area of greater
concentration to an area of lesser concentration by way of a channel protein, it is
called - ANSWER-Facilitated diffusion
A solution with a pH of 4 has _____ the concentration of H+ present compared to a
solution with a pH of 5 - ANSWER-10 times
, If an element has an atomic number of 6 and a mass number of 14, how many
neutrons does it have? - ANSWER-8
A substance that is considered a strong base has a pH value of - ANSWER-12
Which level of protein structure ultimately determines all the other levels of
structure? - ANSWER-Primary
When a protein is composed of more than one polypeptide chain, the arrangement of
the chains is called the ________ structure. - ANSWER-Quaternary
All enzymes are - ANSWER-Proteins
Which polymer serves as the information storage molecule for cells? - ANSWER-
Nucleic acids
If one strange is CCAATTG on DNA then the complementary chain is - ANSWER-
GGTTAAC
The bases of the two DNA chains are linked in the middle of the molecule by ____
bonds. - ANSWER-Hydrogen
The external skeleton of many invertebrates is made of - ANSWER-Chitin
Which is incorrect about the plasma membrane? - ANSWER-Proteins embedded in
the lipid bilayer do not move.
Which of the following kingdoms are prokaryotes? - ANSWER-Archaea
Which of the following is not an organelle? - ANSWER-Ribosome
Which of the following is a specialized type of vesicle? - ANSWER-Lysosome
If a paramecium's contractile vacuole stops working, what might happen to the
organism? - ANSWER-It would fill with water and may burst
Which of the following is found in plant cells but not animal cells? - ANSWER-Central
vacuole
Which of the following is NOT a type of cytoskeletal fiber? - ANSWER-Pili
Which process would enable a white blood cell to ingest a bacteria? - ANSWER-
Phagocytosis
When a cell membrane engulfs fluid droplets it is called - ANSWER-Pinocytosis
Which of these is an electron carrier molecule? - ANSWER-NAD+
The first stage of cellular respiration, called ________, takes place in the cytoplasm
of the cell and needs no oxygen. - ANSWER-Glycolysis
