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WorksheetsCell Bio (exam 1 material)
Total questions: 27
Worksheet time: 16mins
Which is the smallest unit of life that can survive and reproduce on its own?
a cell
a molecule
an organ
an atom
When applying the process of science, which of these is tested?
a conclusion
a result
a hypothesis
a control group
A covalent chemical bond is one in which
outer-shell electrons of one atom are transferred to fill the inner electron shell of another atom.
outer-shell electrons of two atoms are shared so the outer electron shells of both atoms are filled.
protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.
electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged.
The partial negative charge in a molecule of water occurs because
the oxygen atom forms hybrid orbitals that distribute electrons unequally around the oxygen nucleus.
one of the hydrogen atoms donates an electron to the oxygen atom.
the oxygen atom acquires an additional electron.
the electrons shared between the oxygen and hydrogen atoms spend more time around the oxygen atom’s nucleus than around the hydrogen atom’s nucleus.
The nucleus of an atom contains
protons and neutrons.
only protons.
protons and electrons.
only electrons.
Which of the following is not a polymer?
cellulose
DNA
glucose
starch
Which nitrogenous base is not found in DNA?
Thymine
Guanine
Uracil
Cytosine
Which structure is the site of the synthesis of proteins that may be exported from the cell?
lysosomes
Golgi body
plasmodesmata
rough ER
Which organelle is the primary site of ATP synthesis in eukaryotic cells?
smooth ER
mitochondia
lysosome
Golgi body
Which of the following statements is correct about diffusion?
It is a passive process in which molecules move from a region of higher concentration to a region of lower concentration.
It is an active process in which molecules move from a region of lower concentration to one of higher concentration.
It requires integral proteins in the cell membrane.
It requires an expenditure of energy by the cell.
Which of the following would increase the electrochemical gradient across a membrane?
a carrier protein
a potassium channel
a proton pump
a chloride channel
Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's
equilibrium point.
endothermic level.
entropy.
activation energy.
A solute moving down its concentration gradient across a membrane via a transport protein is a form of
osmosis
facilitated diffusion
diffusion
active transport
The ATP made during glycolysis is generated by
chemiosmosis.
electron transport.
substrate-level phosphorylation.
oxidation of NADH to NAD+.
The oxygen consumed during cellular respiration is involved directly in which process or event?
accepting electrons at the end of the electron transport chain
the phosphorylation of ADP to form ATP
glycolysis
the citric acid cycle
In addition to ATP, what are the end products of glycolysis?
CO2 and pyruvate
CO2 and NADH
NADH and pyruvate
CO2 and H2O
The ATP made during fermentation is generated by which of the following?
the electron transport chain
substrate-level phosphorylation
aerobic respiration
oxidative phosphorylation
Where are the molecules of the electron transport chain for photosynthesis found in plant cells?
thylakoid membranes of chloroplasts
outer membrane of mitochondria
matrix of mitochondria
cytoplasm
Which of the following are products of the light reactions of photosynthesis that are utilized in the Calvin cycle?
H2O and O2
CO2 and glucose
ADP and NADP+
ATP and NADPH
Which of the various species concepts distinguishes two species based on the degree gene flow between them?
phylogenetic
morphological
ecological
biological
The term "reproductive isolation mechanism" refers to
the process by which sexual selection evolves within a population.
specific areas where males compete for females.
a blockage of gene flow between populations.
the inability of a species to continue reproduction.
The 13-year and 17-year cicadas are isolated by
mechanical isolation
temporal isolation
habitat isolation
behavioral isolation
Allopatric speciation requires
geographic isoloation
polyploidy
adaptive radiation
rapid evolutionary change
When isolated populations come into contact and the resulting hybrids are less fit than the parent species, ______________ is expected to occur to the parent species.
reinforcement of divergence
creation of new species
extinction of one population
fusion of the populations
