An amoeba in a pond engulfs and consumes a paramecium. The amoeba uses which of the following to quickly break down the organic
molecules in the paramecium?
Another word for nuclear division is:
b. cytoplasmic streaming
a dense region of stored RNA within the nucleus
the folds of the inner mitochondrial membrane where ATP is made
In a cell, which of the following organelles most likely contains digestive enzymes?
In which of the following ways does a bacterial cell differ from an animal cell?
A. A bacterial cell is much larger than an animal cell.
B A bacterial cell has more mitochondria than an animal cell.
C. A bacterial cell has RNA for its genetic material, whereas an animal cell does not.
D. A bacterial cell does not have membrane-bound organelles, whereas an animal cell does
A bacterial cell does not have membrane-bound organelles, whereas an animal cell does
made of amylopectin and holds adjacent plant cells together
Many animals have internal or external skeletons that provide support and structure. Which of the following parts of plant cells play a similar
A. cell membranes
B. cell walls
microtubules that move chromosomes around before a cell divides
Most membrane functions are performed by:
the movement of organelles from one location to another within a cell
the organelle which stores food in plant cells
The products of the mitochondrion, which are reactants for a chloroplast are:
a. water, light and carbon dioxide
b. oxygen, food and ATP
c. water and carbon dioxide
d. water, ATP and light
water and carbon dioxide
The purpose of the spark (lightning) in Miller's 1953 experiment was to:
a. light his Bunsen burner
b. condense amino acids in rain drops
c. rearrange atmospheric gases into organic molecules
d. simulate the gases of the earth's early atmosphere
rearrange atmospheric gases into organic molecules
A scientist discovered a new organism in some caves in Pennsylvania. The organism has the following characteristics:
• It is multicellular.
• Its cells lack cell walls.
• It is motile.
• It is heterotrophic.
Based on this information, to which kingdom does the organism belong?
The scientist who proved that cells come from cells that already exist was:
d. none of the above
Scientists have discovered a new type of organism. To assign the organism to a domain and
kingdom, which of the following is most important for scientists to know?
A. the organism's cell structure
B. the organism's population size
C. the organism's social behavior
D. the organism's reproductive rate
the organism's cell structure
A single prokaryotic cell can divide several times in an hour. Few eukaryotic cells can divide as quickly. Which of the following statements best
explains this difference?
A. Eukaryotic cells are smaller than prokaryotic cells.
B. Eukaryotic cells have less DNA than prokaryotic cells.
C. Eukaryotic cells have more cell walls than prokaryotic cells.
D. Eukaryotic cells are more structurally complex than prokaryotic cells
Eukaryotic cells are more structurally complex than prokaryotic cells
Some cells, such as human nerve and muscle cells, contain many more mitochondria than do other cells, such as skin cells. Why do some cells
have more mitochondria than others?
A. The cells use more energy.
B. The cells store more nutrients.
C. The cells degrade more proteins.
D. The cells divide more frequently
The cells use more energy.
stores ions, water toxic wastes amino acids and sugar in plant cells
Which of the following best describes the formation of a zygote?
A. A sperm cell nucleus and an egg cell nucleus fuse.
B. A cell's DNA replication and mitosis are accelerated.
C. A succession of cell divisions produces a solid mass of cells.
D. A cell with 46 chromosomes divides to form cells with 23 chromosomes each.
A sperm cell nucleus and an egg cell nucleus fuse.
Which of the following is a main function of the cell wall? 30 .
A. to store carbohydrates for later use
B. to give the cell a rigid structure
C. to package proteins for export
D. to carry out photosynthesis
to give the cell a rigid structure
Which of the following is a reason as to why cells are relatively small in terms volume:
a. diffusion of nutrients and wastes works best over short distances
b. large cells do not have enough membrane surface area to exchange materials in a timely fashion
c. life's activities are more easily controlled by the nucleus in small cells
d. all of the above are correct
all of the above are correct
Which of the following is capable of breaking down worn out organelles for recycling:
a. golgi body
c. secretory vesicle
d. transport vesicle
Which of the following statements correctly matches a cell part with its function?
A. The cell membrane packages lipids for export.
B. The mitochondria perform photosynthesis.
C. The lysosome digests molecules.
D. The nucleus produces energy.
The lysosome digests molecules.
Which of the following statements explains why viruses are able to reproduce only inside host cells
instead of being able to reproduce on their own?
A. Viruses cannot function at temperatures other than 98.6°F.
B. Viruses lack spindle fibers that correctly align chromosomes for division.
C. Viruses are too small to effectively make copies of themselves on their own.
D. Viruses lack the cellular machinery needed to make copies of their genetic material.
Viruses lack the cellular machinery needed to make copies of their genetic material.
Which organelle is the site of the synthesis of most of a cell's lipids:
a. the Rough E.R.
b. the Golgi body
d. the Smooth E.R.
the Smooth E.R.