A&P Exam 2

polar covalent bonds

A molecule of ammonia contains one atom of nitrogen and three atoms of hydrogen. These are linked with ________. a. ionic bonds b. nonpolar covalent bonds c. polar covalent bonds d. hydrogen bonds

any of the above

A mutation in the gene for a cyclin protein might result in which of the following? a. a cell with additional genetic material than normal b. cancer c. a cell with less genetic material than normal d. any of the above

nucleic acids

A pentose sugar is a part of the monomer used to build which type of macromolecule? a. polysaccharides b. nucleic acids c. phosphorylated glucose d. glycogen

salt

A substance formed of crystals of equal numbers of cations and anions held together by ionic bonds is called a(n) ________. a. noble gas b. salt c. electrolyte d. dipole

pleuripotency, multipotency, oligopotency, unipotency

Arrange the following terms in order of increasing specialization: oligopotency, pleuripotency, unipotency, multipotency. a. multipotency, pleuripotency, oligopotency, unipotency b. pleuripotency, oligopotency, multipotency unipotency c. oligopotency, pleuripotency, unipotency, multipotency d. pleuripotency, multipotency, oligopotency, unipotency

organic

CH4 is methane. This compound is ________. a. inorganic b. organic c. reactive d. a crystal

saliva contains enzymes

Chewing a bite of bread mixes it with saliva and facilitates its chemical breakdown. This is most likely due to the fact that ________. a. the inside of the mouth maintains a very high temperature b. chewing stores potential energy c. chewing facilitates synthesis reactions d. saliva contains enzymes

osmosis; pinocytosis

Choose the answer that best completes the following analogy: Diffusion is to ________ as endocytosis is to ________.

the water

Choose the term that best completes the following analogy: Cytoplasm is to cytosol as a swimming pool containing chlorine and flotation toys is to _____. a. the walls of the pool b. the chlorine c. the flotation toys d. the water

Epithelial tissue, connective tissue, muscle tissue, neural tissue

Four major categories of tissues

3

How many "letters" of an RNA molecule, in sequence, does it take to provide the code for a single amino acid? a. 1 b. 2 c. 3 d. 4

double helix

In DNA, nucleotide bonding forms a compound with a characteristic shape known as a(n) ________. a. beta chain b. pleated sheet c. alpha helix d. double helix

active transport

Ion pumps and phagocytosis are both examples of ________. a. endocytosis b. passive transport c. active transport d. facilitated diffusion

DNA, nucleosome, chromatin, chromosome

Place the following structures in order from least to most complex organization: chromatin, nucleosome, DNA, chromosome a. DNA, nucleosome, chromatin, chromosome b. nucleosome, DNA, chromosome, chromatin c. DNA, chromatin, nucleosome, chromosome d. nucleosome, chromatin, DNA, chromosome

specificity

The ability of an enzyme's active sites to bind only substrates of compatible shape and charge is known as ________. a. selectivity b. specificity c. subjectivity d. specialty

Synthesis

The bonding of calcium, phosphorus, and other elements produces mineral crystals that are found in bone. This is an example of a(n) ________ reaction. a. catabolic b. synthesis c. decomposition d. exchange

Protons

The characteristic that gives an element its distinctive properties is its number of ________. a. protons b. neutrons c. electrons d. atoms

down, concentration

The diffusion of substances within a solution tends to move those substances ________ their ________ gradient.

potential energy

The energy stored in a foot of snow on a steep roof is ________. a. potential energy b. kinetic energy c. radiant energy d. activation energy

ribosomes

The rough ER has its name due to what associated structures? a. Golgi apparatus b. ribosomes c. lysosomes d. proteins

Atom

The smallest unit of an element that still retains the distinctive behavior of that element is an ________. a. electron b. atom c. elemental particle d. isotope

oxygen, carbon, hydrogen, nitrogen

Together, just four elements make up more than 95 percent of the body's mass. These include ________. a. calcium, magnesium, iron, and carbon b. oxygen, calcium, iron, and nitrogen c. sodium, chlorine, carbon, and hydrogen d. oxygen, carbon, hydrogen, and nitrogen

nucleus; cytoplasm

Transcription and translation take place in the ________ and ________, respectively. a. nucleus; cytoplasm b. nucleolus; nucleus c. nucleolus; cytoplasm d. cytoplasm; nucleus

Ty's blood is slightly alkaline

Ty is three years old and as a result of a "stomach bug" has been vomiting for about 24 hours. His blood pH is 7.48. What does this mean? a. Ty's blood is slightly acidic. b. Ty's blood is slightly alkaline. c. Ty's blood is highly acidic. d. Ty's blood is within the normal range

all of they above

Uracil __________ . a. contains nitrogen b. is a pyrimidine c. is found in RNA d. all of the above

stop certain cells from dividing

What is a primary function of tumor suppressor genes? a. stop all cells from dividing b. stop certain cells from dividing c. help oncogenes produce oncoproteins d. allow the cell to skip certain phases of the cell cycle

cells from the umbilical cord and from baby teeth

What multipotent stem cells from children sometimes banked by parents? a. fetal stem cells b. embryonic stem cells c. cells from the umbilical cord and from baby teeth d. hematopoietic stem cells from red and white blood cells

H2

Which of the following is a molecule, but not a compound? a. H2O b. 2H c. H2 d. H+

mitochondria

Which of the following organelles produces large quantities of ATP when both glucose and oxygen are available to the cell? a. mitochondria b. peroxisomes c. lysosomes d. ER a. mitochondria

G1

Which of the following phases is characterized by preparation for DNA synthesis? a. G0 b. G1 c. G2 d. S phase

CGAATATA

Which of the following sequences on a DNA molecule would be complementary to GCTTATAT? a. TAGGCGCG b. ATCCGCGC c. CGAATATA d. TGCCTCTC c. CGAATATA

ribosomes

Which of the following structures could be found within the nucleolus? a. chromatin b. histones c. ribosomes d. nucleosomes

has both polar and nonpolar regions

A phospholipid ________. a. has both polar and nonpolar regions b. is made up of a triglyceride bonded to a phosphate group c. is a building block of ATP d. can donate both cations and anions in solution

salt

A substance dissociates into K+ and Cl- in solution. The substance is a(n) ________. a. acid b. base c. salt d. buffer

Decomposition

AB → A + B is a general notation for a(n) ________ reaction. a. anabolic b. endergonic c. decomposition d. exchange

integral proteins

Because they are embedded within the membrane, ion channels are examples of....

suspension

Jenny mixes up a batch of pancake batter, then stirs in some chocolate chips. As she is waiting for the first few pancakes to cook, she notices the chocolate chips sinking to the bottom of the clear glass mixing bowl. The chocolate chip batter is an example of a ________. a. solvent b. solute c. solution d. suspension

a double cell membrane

The nucleus and mitochondria share which of the following features? a. protein-lined membrane pores b. a double cell membrane c. the synthesis of ribosomes d. the production of cellular energy

glucose

What organic compound do brain cells primarily rely on for fuel? a. glucose b. glycogen c. galactose d. glycerol

an ion

When an atom donates an electron to another atom, it becomes a. an ion b. an anion c. nonpolar d. all of the above

hydrogen and hydrogen

Which of the following combinations of atoms is most likely to result in a chemical reaction? a. hydrogen and hydrogen b. hydrogen and helium c. helium and helium d. neon and helium

hey are all polymers of protein subunits.

Which of the following is a feature common to all three components of the cytoskeleton? a. They all serve to scaffold the organelles within the cell. b. They are all characterized by roughly the same diameter. c. They are all polymers of protein subunits. d. They all help the cell resist compression and tension.

production of proteins

Which of the following is a function of the rough ER? a. production of proteins b. detoxification of certain substances c. synthesis of steroid hormones d. regulation of intracellular calcium concentrations

amino

Which of the following is a functional group that is part of a building block of proteins? a. phosphate b. adenine c. amino d. ribose

sodium ions and chloride ions

Which of the following is most likely to be found evenly distributed in water in a homogeneous solution? a. sodium ions and chloride ions b. NaCl molecules c. salt crystals d. red blood cells

DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars

Which of the following is not a difference between DNA and RNA? a. DNA contains thymine whereas RNA contains uracil b. DNA contains deoxyribose and RNA contains ribose c. DNA contains alternating sugar-phosphate molecules whereas RNA does not contain sugars d. RNA is single stranded and DNA is double stranded

the ribsome

Which of the following is not made out of RNA? a. the carriers that shuffle amino acids to a growing polypeptide strand b. the ribosome c. the messenger molecule that provides the code for protein synthesis d. the intron

Covalent bonds are stronger than ionic bonds.

Which of the following statements about chemical bonds is true? a. Covalent bonds are stronger than ionic bonds. b. Hydrogen bonds occur between two atoms of hydrogen. c. Bonding readily occurs between nonpolar and polar molecules. d. A molecule of water is unlikely to bond with an ion.

hematopoietic

Which type of stem cell gives rise to red and white blood cells? a. endothelial b. epithelial c. hematopoietic d. mesenchymal

Catabolic, exergonic, and decomposition

________ reactions release energy. a. Catabolic b. Exergonic c. Decomposition d. Catabolic, exergonic, and decomposition