biology no4
The stack of thylakoids labeled "A" in this figure is called
granum. (A stack of thylakoid discs in Chloroplasts. Can have 10 to 100)
What does the folding of the mitochondrial inner membrane, shown here, provide?
greater surface area for ATP production
Which of the following is a correct match of a molecule and the location where it is principally used?
mRNA - nucleus and cytoplasm
Which organelle modifies the contents within vesicles and then repackages them for export?
Golgi apparatus
Which is the most common type of intercellular junction between cells of the bladder?
adhesion junctions
Without gap junctions in certain tissues,
cells would not be able to communicate with each other
Plant cells have plasmodesmata that
connect the cytoplasm of one cell with that of another.
Chloroplasts and mitochondria are similar in that they both
contain DNA.
A prokaryotic cell
does not have a membrane-bound nucleus.
Compared with a eukaryotic cell, a prokaryotic cell
lacks organelles beyond ribosomes.
The cell walls of bacterial cells and plant cells function in
maintaining cell shape.
Which of the following organelles would be abundant in a sperm cell that is actively swimming towards an egg cell?
mitochondria
Both plants and animals need mitochondria to
produce ATP.
In which way are vesicles different from vacuoles?
they are smaller
Which of the following is a function of glycoproteins?
to permit cells to recognize one another
Which of the following organelles would form a membrane-bound package, also known as a vesicle?
Golgi apparatus
Receptor proteins
bind to a signal molecule and bring about a cellular response.
The main structural component of a plant cell wall is
cellulose
Chromosomes are made from
condensed chromatin.
All cells have some characteristics in common; both prokaryotic and eukaryotic cells have
cytoplasm, a plasma membrane, and DNA.
The glycoproteins found in the plasma membrane function in what capacity?
establishing the identity of the cell
Which of the following is involved in the breakdown of damaged organelles?
lysosome
Which of the following allows eukaryotic cells and their organelles to move?
the cytoskeleton
Which of the following statements describes the function of a chloroplast?
It converts light energy into chemical energy.
Which of the following is a type of intracellular protein?
All of the above are types of intracellular proteins.
Plant cells have walls but do not have plasma membranes.
False
Proteins within the extracellular matrix play a role in communicating between the matrix and the cytoskeleton.
True
Below is a diagram of a bacterium. What part of the bacterial cell does Y represent?
nucleoid
Which of the following structures would not be found only in a eukaryoticcell?
nucleus
The nucleus has a double membrane that encloses the DNA. Inside the nucleus, the DNA acts as the template to produce mRNA and ribosomes.To exit the nucleus, these molecules must
pass through pores that span both membranes.
The hydrophilic parts of the plasma membrane are oriented towards both the outside of the cell and the cytoplasm.
True
What must materials pass through to enter or leave a cell?
plasma membrane
Identify the organelle - function pairing that is mismatched.
plasma membrane - outermost barrier of a plant cell
Which feature is found in all cells?
plasma membrane composed of phospholipids
Plant cells are connected to one another by
plasmodesmata
Which structures determine the flexibility of the extracellular matrix?
proteins
Cell size is limited because ________ is critical to a cell's function.
surface-area-to-volume ratio
What function does the nucleolus have?
synthesizes ribosomal RNA
Both the nuclear membrane and the plasma membrane are composed of phospholipids.
true
Eukaryotic cells have DNA enclosed in a double membrane called the nucleus. The nucleus functions to
separate the DNA from other activities that occur in the cytoplasm.
