BIO 1 Exam 1
The radioisotope C-14 becomes N-14 as ________. a. a neutron decomposes to form a proton and electron b. a neutron decomposes to form six electrons c. three electrons are gained d. one electron is gained e. a proton decomposes to form six electrons
A.) a neutron decomposes to form a proton and electron
As water boils and turns to steam, what happens to the hydrogen bonds? A. The hydrogen bonds generate additional bonds. B. The hydrogen bonds break. C. The hydrogen bonds form a crystalline lattice structure. D. The hydrogen bonds continually break and join together again. E. The hydrogen bonds become stronger.
B.) The hydrogen bonds break
A hydrogen bond and a van der Waal interaction are similar in that _______.
Both are weak compared to covalent bonds
An atom X contains 14 protons, 13 electrons, and 12 neutrons, and atom Y contains 14 protons, 14 electrons, and 12 neutrons. What can you conclude? A. Y is an ion but X is not. B. X and Y are atoms of the same element. C. X and Y are isotopes of the same element. D. X and Y are both ions. E. X and Y both have filled valence shells.
C
Carolus Linneaus created a system to name organisms known as the ________. a. reductionist method b. organic classification of species c. taxonomic system of classification d. specific epithet e. binomial system of nomenclature
E.) A binomial system of nomenclature
What is the purpose of the genetic code within DNA? a. To provide instructions on how to make a diverse organism b. To provide immunity to different types of diseases c. To generate a new set of mutations to adapt in an adverse environment d. To manufacture proteins that define a cell's function e. To make new cells to replace injured cells
A or D
A DNA molecule is made up of: A. nucleotides B. lipids C. fatty acids D. proteins E. carbohydrates
A.) Nucleotides
What organic molecules is the primary structural component of cell membranes? A. phospholipids B. cellulose C. glycogen D. disaccharides E. adenine triphosphate
A.) Phospholipids
What type of bond is formed if one atom is more electronegative than the other atom? A. polar covalent B. van der Waals C. nonpolar covalent D. hydrogen E. covalent
A.) Polar covalent
Which statement best describes the cell theory?
All living organisms are composed of basic units called cells
Which pair matches the correct macromolecule with the bond that joins its subunits? A.) polysaccharide-peptide bond B.) nucleic acid-phosphodiester linkage C.) Protein-ester linkage D.) steroid-peptide bond
B
Which description illustrates the tertiary structure of a protein molecule? A. bonding of two amino acids to form a dipeptide B. three-dimensional shape of an individual polypeptide chain C. order in which amino acids are joined in a peptide chain D. folding of a peptide chain to form an alpha helix E. association of several polypeptide chains by weak bonds
B.) 3-d shape of an individual polypeptide chain
Similar families of organisms are next grouped together in the same: A. genus B. order C. phylum D. kingdom E. class
B.) Order or A.) genus
Which process is most directly associated with the theory of evolution? A. Mutations changing the gene pool B. Production of large numbers of offspring C. Populations changing over time D. Competition between members of a population for limited resources E. Sexual reproduction producing variation in a population
C.) Populations changing over time
The four kingdoms included in the domain Eukarya are ________. a. Bacteria, Protista, Plantae, and Animalia b. Archaea, Bacteria, Plantae, and Animalia c. Archaea, Fungi, Plantae, and Animalia d. Protista, Fungi, Plantae, and Animalia e. Bacteria, Fungi, Plantae, and Animalia
D.) Protista, Fungi, Plantae, and Animalia
Consider the aquatic insects pictured in the accompanying figure. Which characteristic of water molecules directly contributes to their remarkable "water walking" success? A. nonpolar covalent bonds B. ionic bonds C. capillary action D. adhesive forces E. hydrogen bonds
E.) Hydrogen bonds
In living organisms, chemical reactions responsible for growth, repair, and nutrition are collectively referred to as: A. homeostasis B. development C. adaptation D. genetics E. metabolism
E.) Metabolism
When we know what kinds of _________ are present in an organic compound, we can predict its chemical behavior.
Functional groups
What carbohydrate energy storage molecule is found in animal liver and muscle cells?
Glycogen
What large molecules are essential in determining the structure and function of cells and tissues?
Proteins
A base is defined as a ________ acceptor.
Proton
What substance is removed during a condensation (dehydration) reaction?
Water
