Biology Chapter Four

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Which of the following is a correct match of a molecule and the location where it is principally used?

mRNA - nucleus and cytoplasm

Both the nuclear membrane and the plasma membrane are composed of phospholipids.

True

Proteins within the extracellular matrix play a role in communicating between the matrix and the cytoskeleton.

True

The hydrophilic parts of the plasma membrane are oriented towards both the outside of the cell and the cytoplasm.

True

The main structural component of a plant cell wall is

cellulose.

Chromosomes are made from

condensed chromatin.

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.

All cells have some characteristics in common; both prokaryotic and eukaryotic cells have

cytoplasm, a plasma membrane, and DNA.

A prokaryotic cell

does not have a membrane-bound nucleus.

The glycoproteins found in the plasma membrane function in what capacity?

establishing the identity of the cell

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

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 eukaryotic cell?

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.

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

Both plants and animals need mitochondria to

produce ATP.

Which structures determine the flexibility of the extracellular matrix?

proteins

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.

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

Which of the following allows eukaryotic cells and their organelles to move?

the cytoskeleton

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 is involved in the breakdown of damaged organelles?

lysosome

Which of the following is a type of intracellular protein?

-actin filaments -myosin -microtubules -kinesin -All of the above are types of intracellular proteins.

Plant cells have walls but do not have plasma membranes.

False

Which of the following organelles would form a membrane-bound package, also known as a vesicle?

Golgi apparatus

Which organelle modifies the contents within vesicles and then repackages them for export?

Golgi apparatus

Which of the following statements describes the function of a chloroplast?

It converts light energy into chemical energy.

Which is the most common type of intercellular junction between cells of the bladder?

adhesion junctions

Receptor proteins

bind to a signal molecule and bring about a cellular response.

Without gap junctions in certain tissues,

fluids may leak out past the barrier the junction would create.

The stack of thylakoids labeled "A" in this figure is called

granum.

What does the folding of the mitochondrial inner membrane, shown here, provide?

greater surface area for ATP production

Compared with a eukaryotic cell, a prokaryotic cell

lacks organelles beyond ribosomes.


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