441.
Nucleic acids include
A
none of these
B
glucose and glycogen.
C
lipids and sugars.
D
DNA and RNA.
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Nucleic acids include
none of these
glucose and glycogen.
lipids and sugars.
DNA and RNA.
In the double helix structure of nucleic acids, cytosine hydrogen bonds to
none of these
ribose.
guanine.
adenine.
If an enzyme solution is saturated with substrate, the most effective way to obtain an even faster yield of products is to
none of these
add more of the enzyme.
heat the solution to 90 degree Centigrade.
add an allosteric inhibitor.
If an enzyme is added to a solution where its substrates and products are in equilibrium, what would occur?
none of these
The reaction would change from endergonic to exergonic.
Additional product would be formed.
Nothing; the reaction would stay at equilibrium.
How can one increase the rate of a chemical reaction?
none of these
Add a catalyst.
Increase the entropy of the reactants.
Decrease the concentration of the reactants.
Enzymes that break down DNA catalyze the hydrolysis of the covalent bonds that join nucleotides together. What would happen to DNA molecules treated with these enzymes?
none of these
The phosphodiester bonds between deoxyribose sugars would be broken.
The two strands of the double helix would separate.
The pyrimidines would be separated from the deoxyribose sugars.
Choose the pair of terms that correctly completes this sentence: Catabolism is to anabolism as .........is to ............
none of these
exergonic; endergonic
work; energy
DNA and RNA.
According to the first law of thermodynamics,
A and B only
the universe loses energy because of heat production.
systems rich in energy are intrinsically unstable and will give up energy with time.
energy can be neither created nor destroyed.
A model of enzyme action is the
none of these
active site model.
activator action model.
induced fit model.
A double-stranded DNA molecule contains a total of 120 purines and 120 pyrimidines. This DNA molecule could be comprised of
none of these
240 adenine and 240 cytosine molecules.
120 thymine and 120 adenine molecules.
240 guanine and 240 thymine molecules.
When Phineas Gage had a metal rod driven into his frontal lobe or when someone had a frontal lobotomy,which of the following occurred?
They could no longer reason.
They lost short-term memory.
They had different emotional responses.
They lost long-term memory.
Cerebral palsy, which disrupts motor messages from brain to muscle, is usually due to damage of
the cerebellum.
basal nuclei of gray matter.
basal nuclei of white matter.
the corpus callosum.
Suprachiasmatic nuclei are found in which structure?
thalamus
hypothalamus
epithalamus
amygdala
Which area of the brain is most intimately associated with the unconscious control of respiration and circulation?
thalamus
cerebellum
medulla
corpus callosum
If you were writing an essay, which part of the brain would be most active?
temporal and frontal lobes
parietal lobe
Brocas area
Wernickes area
Which part of the vertebrate nervous system is most involved in preparation for the fight -or-flight response?
sympathetic
somatic
central
visceral
Integration of simple responses to certain stimuli, such as the patellar reflex, is accomplished by which of the following?
spinal cord
hypothalamus
corpus callosum
cerebellum
Which processes in animals are regulated by circadian rhythms?
sleep cycles
hormone release
sex drive
A, B, and C
By comparing the size and degree of convolution of various vertebrate cerebral cortices, biologists would gaininsight into the relative
size of the brain centers of taxonomic groups.
emotions and learning capabilities of vertebrate classes.
motor impulse complexities.
sophistication of behaviors.
The cerebral cortex plays a major role in all of the following except
short-term memory.
long-term memory.
circadian rhythm.
foot-tapping rhythm.