AP Biology Cell Exam
A biologist isolates numerous tiny, green-pigmented cells from a sample of lake water.
The cells are covered with a mucilaginous sheath. They contain relatively large amounts
of chlorophyll a and phycobilin pigments and lack a compact organized nucleus.
Electron microscopy will reveal that these cells also contain which of the following pairs
of subcellular structures?
(A) Ribosomes and chloroplasts
(B) Ribosomes and mitochondria
(C) Golgi bodies and a cell wall
(D) Thylakoids and a cell wall
(E) Chloroplasts and mitochondria -correct answer- (D)
A discrete packet of light is called:
(A) photon
(B) neutron
(C) proton
(D) wavelength -correct answer- (A)
A lipid-soluble hormone, estrogen, is secreted from the ovaries. This molecule travels
through the body via the bloodstream. A researcher was interested in reducing
estrogen's effect in order to determine the response of decreased estrogen on the
organism. Which of the following is a valid strategy for reducing effects of estrogen on
the whole research organism?
(A) Treat with a competitive inhibitor drug that blocks all receptors at the plasma
membrane
(B) Treat with lipid-soluble testosterone
(C) Treat with a lipid-soluble noncompetitive inhibitor that specifically reduces estrogen
binding to the intracellular receptor
(D) Remove ovaries of the organism -correct answer- (C)
A molecule releases energy gained from absorption of a photon through: I. fluorescence
II. heat III. light
(A) I only
(B) II only
, (C) III only
(D) I, II and III -correct answer- (D)
A student using a light microscope observes a cell and correctly decides that it is a plant
cell because
(A) ribosomes are visible
(B) an endoplasmic reticulum can be seen
(C) a cell membrane is present
(D) it has a large central vacuole
(E) centrioles are present -correct answer- (D)
A wavelength of which light is reflected by a blue-colored plant?
(A) violet
(B) yellow
(C) blue
(D) lime -correct answer- (C)
All of the following are examples of the benefits of bacteria to humans EXCEPT
(A) vitamin manufacture in the large intestine
(B) bacterial action in the making of silage
(C) bacterial action in the making of exotoxins
(D) the production of drugs such as streptomycin
(E) the production of acids that flavor cheese -correct answer- (C)
All of the following are functions of the smooth endoplasmic reticulum of animals
EXCEPT
(A) detoxification of poisons in the liver
(B) storage of Ca2+ in the sarcomere of muscles
(C) synthesis of proteins
(D) synthesis of lipids
(E) synthesis of steroid hormones -correct answer- (C)
All of the following are typical components of the plasma membrane of a eukaryotic cell
EXCEPT
(A) glycoproteins
(B) cytochromes
(C) cholesterol
(D) phospholipids
(E) integral proteins -correct answer- (B)
All of the following cell components are found in prokaryotic cells EXCEPT
(A) DNA
(B) ribosomes
(C) cell membrane
(D) nuclear envelope
(E) enzymes -correct answer- (D)
A biologist isolates numerous tiny, green-pigmented cells from a sample of lake water.
The cells are covered with a mucilaginous sheath. They contain relatively large amounts
of chlorophyll a and phycobilin pigments and lack a compact organized nucleus.
Electron microscopy will reveal that these cells also contain which of the following pairs
of subcellular structures?
(A) Ribosomes and chloroplasts
(B) Ribosomes and mitochondria
(C) Golgi bodies and a cell wall
(D) Thylakoids and a cell wall
(E) Chloroplasts and mitochondria -correct answer- (D)
A discrete packet of light is called:
(A) photon
(B) neutron
(C) proton
(D) wavelength -correct answer- (A)
A lipid-soluble hormone, estrogen, is secreted from the ovaries. This molecule travels
through the body via the bloodstream. A researcher was interested in reducing
estrogen's effect in order to determine the response of decreased estrogen on the
organism. Which of the following is a valid strategy for reducing effects of estrogen on
the whole research organism?
(A) Treat with a competitive inhibitor drug that blocks all receptors at the plasma
membrane
(B) Treat with lipid-soluble testosterone
(C) Treat with a lipid-soluble noncompetitive inhibitor that specifically reduces estrogen
binding to the intracellular receptor
(D) Remove ovaries of the organism -correct answer- (C)
A molecule releases energy gained from absorption of a photon through: I. fluorescence
II. heat III. light
(A) I only
(B) II only
, (C) III only
(D) I, II and III -correct answer- (D)
A student using a light microscope observes a cell and correctly decides that it is a plant
cell because
(A) ribosomes are visible
(B) an endoplasmic reticulum can be seen
(C) a cell membrane is present
(D) it has a large central vacuole
(E) centrioles are present -correct answer- (D)
A wavelength of which light is reflected by a blue-colored plant?
(A) violet
(B) yellow
(C) blue
(D) lime -correct answer- (C)
All of the following are examples of the benefits of bacteria to humans EXCEPT
(A) vitamin manufacture in the large intestine
(B) bacterial action in the making of silage
(C) bacterial action in the making of exotoxins
(D) the production of drugs such as streptomycin
(E) the production of acids that flavor cheese -correct answer- (C)
All of the following are functions of the smooth endoplasmic reticulum of animals
EXCEPT
(A) detoxification of poisons in the liver
(B) storage of Ca2+ in the sarcomere of muscles
(C) synthesis of proteins
(D) synthesis of lipids
(E) synthesis of steroid hormones -correct answer- (C)
All of the following are typical components of the plasma membrane of a eukaryotic cell
EXCEPT
(A) glycoproteins
(B) cytochromes
(C) cholesterol
(D) phospholipids
(E) integral proteins -correct answer- (B)
All of the following cell components are found in prokaryotic cells EXCEPT
(A) DNA
(B) ribosomes
(C) cell membrane
(D) nuclear envelope
(E) enzymes -correct answer- (D)
