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WorksheetsBio 1 Lecture Exam 1
Total questions: 19
Worksheet time: 10mins
Which of the following sequences of organization is likely to be seen in a multicellular organism, going from smallest to largest?
cell, organ tissue, organism
cell, organ, system, tissue
cell, tissue, system, organism
organism, system, organ, tissue
tissue, system, cell, organ
Which best describes a control group in an experiment?
It is subjected to the condition that is being tested
It is a sample taken through all experimental steps except the one being tested
It is treated identically as the experimental group
It tests the dependent variable
All of the above
Which statement is NOT true about experimental design?
All conditions are held the same except for the condition being tested by the experiment
It is best to use genetically identical mice to reduce the uncontrolled variables
Mice for each group should be selected at random
The condition being tested in an experiment is the control variable
The dependent variable is observed at the end of the experiment when statistical comparisons are made between groups
Some students consume large amounts of coffee and so-called energy drinks to help them stay alert when studying. You notice that many who engage in this practice seem to do poorly on exams. Suppose you want to investigate the relationship between caffeine consumption and exam performance. Which of the following statements would be an appropriate hypothesis?
Students who consume large amounts of caffeine while studying will have lower exam scores than those who consume less caffeine.
One should avoid consuming too much caffeine while studying.
Too much caffeine is harmful to your health.
Many students consume large amounts of caffeine while studying.
Caffeine increases alertness but also increases anxiety.
In the late 1800s, Louis Pasteur was searching for a vaccine for anthrax in livestock. One French veterinarian had a local reputation for being able to cure anthrax by applying oils and wrapping the animal in cloth to induce a fever. Pasteur also knew that some animals got well on their own when left untreated. Pasteur tested the effectiveness of the local veterinarian's methods by injecting four cattle with anthrax bacteria. He then directed the veterinarian to perform his procedures on two cattle. The other two cattle were left alone. What is the rationale for Pasteur's experimental design?
Two cattle represent a test of the veterinarian's hypothesis; two represent a test of Pasteur's hypothesis
Two cattle represent a test of the treatment; two serve as a control to determine the likelihood of survival without treatment.
Two cattle represent a test based on inductive reasoning; two serve to test deductive reasoning.
The two cattle that are treated are the only test being conducted; the other two cattle serve no purpose beyond representing all the untreated cattle in France.
The two cattle not being treated were just a whim on Pasteur's part.
Ribosomes are the site of synthesis of:
DNA.
RNA.
proteins.
nucleoli.
glucose
All cells possess all of the following components EXCEPT:
cytoplasm
genetic material
a nuclear membrane.
a plasma cell membrane.
ribosomes.
The cytoplasm of eukaryotic cells contains all of the following EXCEPT:
water
dissolved nutrients.
organelles
enzymes
chromosomes
How does a cell rid itself of defective or malfunctioning organelles?
The organelles are engulfed by plastids and stored.
Defective organelles accumulate until the cell itself dies.
Lysosomes assist in the removal of defective organelles by digesting them.
Ribosomes remove malfunctioning organelles by degrading the parts.
The organelles are exported by phagocytosis.
Cyanide binds to at least one molecule involved in producing ATP. If a cell is exposed to cyanide, most of the cyanide will be found within the
mitochondria.
ribosomes.
peroxisomes
lysosomes.
endoplasmic reticulum.
Which statement about the genomes of prokaryotes is correct?
Prokaryotic genomes are diploid throughout most of the cell cycle.
Prokaryotic chromosomes are sometimes called plasmids.
Prokaryotic cells have multiple chromosomes, "packed" with a relatively large amount of protein.
The prokaryotic chromosome is not contained within a nucleus but, rather, is found at the nucleolus.
Prokaryotic genomes are composed of circular DNA.
The function of which cellular structure would be least affected by a malfunctioning Golgi apparatus?
Secretory vesicles
Lysosome
Plasma membrane
Endoplasmic reticulum
The ciliary action of the cells lining the lumen of fallopian tube are responsible for transporting an egg from the ovaries to the uterus. Which cytoskeleton structures are linked to this movement?
Microfilaments (Actin)
Intermediate filaments
Cilia
Flagella
Your trachea have short hair-like cell process that move the mucus. What is the name of these hair like structures and which cytoskeletal elements form them?
Flagella, microfilaments
Villi, intermediate filaments
Microvilli, microtubules
Cilia, mictrotubules
Why would more carbon dioxide taken up by the oceans cause concern?
The buffering action of carbonic acid (H2CO3) causes the pH of seawater to rise.
There is no cause for concern. Carbonic acid (H2CO3) is an excellent buffer and will help keep the pH of seawater constant.
More carbon dioxide causes an increase in carbonic acid (H2CO3), which leads to an increase in the concentration of carbonate ion (CO32−).
More carbon dioxide causes an increase in carbonic acid (H2CO3), which leads to a decrease in the concentration of carbonate ion (CO32−).
None of the choices is correct.
A solution at pH 6 contains __________ than the same amount of solution at pH 8.
100 times less H+
4 times more H+
4 times less H+
2 times more H+
100 times more H+
Carbon dioxide (CO2) is readily soluble in water, according to the equation CO2 + H2O ↔ H2CO3. Carbonic acid (H2CO3) is a weak acid. Respiring cells release CO2 into the bloodstream. What will be the effect on the pH of blood as that blood first comes in contact with respiring cells?
Blood pH will decrease slightly.
Blood pH will first increase, then decrease as CO2 combines with hemoglobin.
Blood pH will remain unchanged.
Blood pH will increase slightly.
Which discovery supports the hypothesis that evolution of the lactase-persistence trait was driven by the selective pressure of the use of milk in sheep farming cultures?
People who are lactase persistent have a mutation in the switch region of the lactase gene.
The lactase gene is present in both humans and domesticated animals.
Ancient pots used to hold milk are about the same age as the lactase-persistence mutations.
Scientists have discovered different mutations for lactase persistence in different cultures.
The allele associated with sickle cell anemia apparently reached a high frequency in some human populations due to:
random mating
superior fitness of heterozygotes in areas where malaria was present
migration of individuals with the allele into other populations
a high mutation rate at that specific gene
genetic drift
