Quiz 2 (Exam 1)
Unlock all answers in this set
Unlock answersquestion
When biologists wish to study the internal ultrastructure of cells, they can achieve the finest resolution by using
answer
a transmission electric microscope
question
All of the following are part of a prokaryotic cell except
answer
an endoplasmic reticulum
question
Prokaryotes are classified as belonging to two different domains. What are the domains?
answer
Bacteria and Archaea
question
Which organelle or structure is absent in plant cells?
answer
Centrosomes
question
Large numbers of ribosomes are present in cells that specialize in producing which of the following molecules?
answer
Proteins
question
Which structure is the site of the synthesis of proteins that may be exported from the cell?
answer
rough ER
question
Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and steroids?
answer
smooth endoplasmic reticulum
question
Which organelle often takes up much of the volume of a plant cell?
answer
Vacuole
question
Which organelle is the primary site of ATP synthesis in eukaryotic cells?
answer
Mitochondrion
question
Which plant cell organelle contains its own DNA and ribosomes?
answer
Mitochondrion
question
Which animal cell organelle contains enzymes that transfer hydrogen from various substrates to oxygen?
answer
Peroxisome
question
Thylakoids, DNA, and ribosomes are all components found in
answer
Chloroplasts
question
In a plant cell, DNA may be found
answer
in the nucleus, mitochondria, and chloroplasts
question
A cell has the following molecules and structures: enzymes, DNA, ribosomes, plasma membrane, and mitochondria. It could be a cell from
answer
nearly any eukaryotic organism
question
What is the most likely pathway taken by a newly synthesized protein that will be secreted by a cell?
answer
ER →Golgi →vesicles that fuse with plasma membrane
question
A biologist ground up some plant leaf cells and then centrifuged the mixture to fractionate the organelles. Organelles in one of the heavier fractions could produce ATP in the light, whereas organelles in the lighter fraction could produce ATP in the dark. The heavier and lighter fractions are most likely to contain, respectively,
answer
Chloroplasts and mitochondria
question
Signals between the ECM and the cytoskeleton may be transmitted by
answer
integrins
question
The cell walls of bacteria, fungi, and plant cells and the extracellular matrix of animal cells are all external to the plasma membrane. Which of the following is a characteristic common to all of these extracellular structures?
answer
They are constructed of polymers that are synthesized in the cytoplasm and then transported out of the cell
question
Cells require which of the following to form cilia or flagella?
answer
Centrosomes
question
Movement of vesicles within the cell depends on what cellular structures?
answer
microtubules and motor proteins
