Deck 3 (MR): Cells

Question 1

Which of the following statements are true of solutions (Select all that apply)?

A)Any substance that dissolves in water is called a solute.
B)Compared to human cells,hypertonic solutions have a greater percentage of water.
C)Compared to human cells,hypotonic solutions have a smaller percentage of water.
D)Human cells placed in a hypotonic solution will shrivel.
E)Human cells placed in a hypertonic solution will swell and burst.f.Blood plasma is isotonic to red blood cells.

Answer 1

A,F

Question 2

Which of the following statements are true of the processes of mitosis and meiosis (Select all that apply)?

A)In one cycle of mitosis,two cells are formed.
B)In one cycle of mitosis,one cell divides once.
C)In mitosis,the new cells have the haploid number of chromosomes.
D)In one cycle of meiosis,four cells are formed.
E)In one cycle of meiosis,two cells divide twice each.f.In meiosis,the new cells have the diploid number of chromosomes.

Answer 2

A,B,D

Question 3

Which of the following statements are true of the stages of mitosis (Select all that apply)?

A)The set of chromosomes replicates itself during prophase.
B)A replicated chromosome is two identical chromatids.
C)The division of the cytoplasm of a cell follows metaphase.
D)During interphase,the chromosomes coil up and become visible.
E)In anaphase,the chromosomes move toward the equator of the cell.f.Spindle fibers are formed during telophase.

Answer 3

B

Question 4

Which of the following statements are true of the process of protein synthesis (Select all that apply)?

A)DNA has the original triplet code in its sequence of bases.
B)A tRNA molecule transfers a triplet from the DNA to the ribosomes in the cytoplasm of a cell.
C)The triplet code specifies three amino acids for each base in the DNA.
D)An mRNA molecule takes a copy of the triplet code to an amino acid.
E)The ribosomes in the cytoplasm form ionic bonds between the amino acids.f.The DNA base sequence for one protein is called a gene.

Question 5

Which of the following statements are true of the nucleus of a cell (Select all that apply)?

A)The nuclear membrane has four layers to protect the chromosomes.
B)The nucleus of a human body cell contains 48 chromosomes.
C)The nucleus of a human body cell is a diploid nucleus.
D)The chromosomes in the nucleus are made of DNA and protein.
E)Human cells that do not have nuclei are mature red blood cells.f.The nucleus is the control center of the cell because it contains most of the mitochondria of the cell.

Question 6

Which of the following statements are true of mitosis and meiosis (Select all that apply)?

A)Both processes are important for the repair of tissue.
B)Both processes are important for the growth of organs and the body as a whole.
C)Only meiosis can form an ovum.
D)Sperm cells are formed by either mitosis or meiosis.
E)New red blood cells are formed by the mitosis of stem cells in the red bone marrow.f.If the skin is cut,mitosis will repair the damage.

Question 7

Which of the following statements are true of cellular transport mechanisms (Select all that apply)?

A)In the body,oxygen is exchanged for CO2 by the process of diffusion.
B)Filtration is the first step in the formation of urine by the kidneys.
C)Osmosis is the process by which the small intestine absorbs water.
D)Some white blood cells carry out phagocytosis.
E)Many body cells take in glucose by facilitated diffusion.f.Active transport is necessary for the sodium pumps of neurons.
G)In pinocytosis,cells pinch off pieces of their cytoplasm to secrete small molecules.
H)Filtration is important for the formation of blood plasma in capillaries.

Question 8

Which of the following statements are true of human chromosomes (Select all that apply)?

A)Human chromosomes are made of DNA,protein,and glucose.
B)The total DNA in a cell is called the genome.
C)The genetic code of DNA is the arrangement of the bases in each chromosome.
D)In the DNA double helix,the base adenine is always paired with guanine.
E)Hydrogen bonds help maintain the shape of the DNA in the chromosomes.f.When a cell is not dividing,the chromosomes may be seen lined up at the edge of the nucleus.

Question 9

Which of the following statements are true of cellular transport mechanisms (Select all that apply)?
a.Facilitated diffusion requires phospholipid pores in the cell membrane.
b.In the body,CO2 is exchanged for oxygen by the process of filtration.
c.Osmosis is the filtration of water.
d.Phagocytosis and pinocytosis are both forms of exocytosis.
e.The energy for diffusion comes from ATP.f.Active transport is the movement of molecules along (with)a concentration gradient.
g.A transporter molecule is specific for what it will carry through the cell membrane.h.The energy for filtration in capillaries comes from blood pressure.

Question 10

Which of the following statements are true of cell membranes (Select all that apply)?

A)Cholesterol provides stability.
B)Receptor sites are made of glucose.
C)A cell membrane is selectively permeable.
D)Phospholipids are not always present.
E)Microvilli are cell membrane folds that sweep materials across the cell surface.f.Receptor sites are part of cell communication.

Question 11

Which of the following statements are true of cell organelles (Select all that apply)?

A)The Golgi apparatus is concerned with secretion.
B)Carbohydrates are synthesized by lysosomes.
C)Cilia are found on cells that absorb large quantities of nutrients.
D)Mitochondria produce ATP.
E)Tunnels for transport throughout the cytoplasm are formed by the endoplasmic reticulum.f.Unneeded proteins are destroyed by ribosomes.
G)The centrioles are concerned with the movement of the cell.
H)The sites of protein synthesis are the proteasomes.