Molecules & Cells
Developmental & Organismic biology
Genetics
Evolution & Historical Perspectives
Ecology
100
How do enzymes affect the reactions in which they take part? A) Most enzymes slow down chemical reactions. B) Enzymes are converted into products in the reaction. C) Enzymes increase the activation energy of the reaction. D) Enzymes decrease the activation energy of the reaction
What is (D) Enzymes decrease the activation energy of the reaction.
100
What is the primary purpose of the receptor proteins located within a cell membrane? A) diffusion B) communication C) active transport D) energy production
What is (B) communication
100
Mutations can occur during mitosis, which produces body cells, and meiosis, which produces gametes. Which of the following statements about mutations is true? A) Mutations in the DNA of body cells cannot affect the individual in which they happen B) A mutation in the DNA of a body cell can cause the cell to produce a protein that does not function. C) A mutation in the DNA of a gamete affects the body cells of the individual that produced the gamete. D) Mutations in the DNA of body cells can cause the offspring to produce a protein that does not function.
What is (B) A mutation in the DNA of a body cell can cause the cell to produce a protein that does not function.
100
Charles Darwin published his theory of evolution in 1859 In what way does modern evolutionary theory differ from the theory as proposed by Darwin? A) Darwin inferred that individuals can evolve, but modern genetic science has shown that this is not true. B) Darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. C) Modern science has disproved most of Darwin's original theory of evolution, because Darwin knew nothing about genes and their role in heredity. D) Genetic studies have shown that gene expression and other factors operate along with natural selection, and most of Darwin's theory has been supported by modern science.
What is (D) Genetic studies have shown that gene expression and other factors operate along with natural selection, and most of Darwin's theory has been supported by modern science.
100
the population size that an environment can sustain is called the carrying capacity. Which of the following factors would NOT decrease the carrying capacity of a pond environment? A) drought B) flooding C) food shortages D) unusually low temperatures.
What is (B) flooding?
200
Describe the role of ribosomes in a cell.
What is synthesize new proteins
200
What is a product of cellular respiration? A) carbon dioxide B) oxygen C) protein D) sugar
What is (A) carbon dioxide
200
Most mutations involve a misplacement of a nucleotide on a DNA segment. Which of the following is NOT a possible result of a mutation? A) The mutation will be passed on to the next generation. B) The mutation will cause immediate death of the individual C) The gene that contains the mutation will be expressed in a new way. D) The gene that contains the mutation will be expressed in the same way as before the mutation.
What is (B) The mutation will cause immediate death of the individual.
200
Genetic variation can increase the pace of evolution. Which would most likely increase genetic variation in a population A) cloning B) twinning C) crossing-over D) asexual reproduction
What is (C) crossing-over?
200
In the Linnaen system of classification, organisms are grouped in successive levels of hierarchy based on similarities in their form and structure.Which level of the Linnaean system does level 8 represent? A) class B) domain C) family D) species
What is (D) species?
300
Four categories of complex, highly organized molecular substances are needed for nearly all of the processes that take place in organisms. Which of the following correctly identifies these four categories of complex, highly organized molecular substances? A) lipids, proteins, water, nucleic acids. B) lipids, proteins, enzymes, nucleic acids C) carbohydrates, lipids, proteins, nucleic acids D) carbohydrates, enzymes, nucleotides, amino acids
What is (C) carbohydrates, lipids, proteins, nucleic acids?
300
The general equations for photosynthesis and cellular respiration show how the two processes are interconnected within the carbon cycle. Which substance is a product of cellular respiration and a reactant in photosynthesis? A) ATP B) glucose C) oxygen D) water
What is (D) water
300
Which of the following statements BEST describes the process of gene expression? A) Messenger, transfer, and ribosomal RNA transcribe information onto a cell's DNA B) The information in DNA is transcribed to RNA and then transcribed to amino acids. C) The information in DNA is transcribed to RNA and then translated to make specific proteins. D) The information in DNA is translated by messenger RNA and then translated to make ribosomal RNA
What is (C) The information in DNA is transcribed to RNA and then translated to make specific proteins.
300
One strand of DNA could be as long as a football field if it were stretched out lengthwise. One of the factors allowing DNA to fit inside the nucleus of a cell is its ability to: A) break apart into separate genes B) extend to form very long, thinn molecules C) coil tightly around associated proteins D) denature from the effect of an enzyme
What is (C) coil tightly around associated proteins?
300
All populations fluctuate in size, influenced by abiotic and biotic factors. Which of the following is an abiotic factor that might reduce the size of a population. A) climate change B) increased predation C) emergence of a new disease D) decreased availability of a food source
What is (A) climate change.
400
What is MOST LIKELY to happen to a cell placed in a hypotonic solution? A) It will burst. B) It will lost water. C) It will shrink. D) It will stay the same size.
What is (A) It will burst.
400
Which of these types of organisms, heterotrophs or autotrophs, use photosynthesis and which use cellular respiration?
What is autotroph--photosynthesis and heterotroph--cellular respiration
400
Give an example of a trait with multiple alleles.
What is blood type.
400
Explain why a male with a recessive X-linked trait usually produces no female offspring with the trait.
He is only XY. The chance the mom would pass a recessive X also is very small.
400
What do the arrows on a food chain or food web represent?
What are movement of energy.
500
Cells can have two kinds of endoplasmic reticulum (ER); smooth ER, which has no ribosomes, and rough ER, which has ribosomes embedded in its membrane. What would happen if the rough endoplasmic reticulum in the cell of an organism lost all of its ribosomes? A) ATP production in the cell would stop. B) Protein production in the organism would stop C) Storage of proteins within the cell would increase. D) Proteins would no longer be exported from the cell.
What is (B) Protein production in the organism would stop.
500
In a single-cell organism, what is the role of the chloroplasts in this organism? A) to store energy B) to absorb water C) to aid in asexual reproduction D) to make food through the process of photosynthesis
What is (D) to make food through the process of photosynthesis
500
If a heterozygous individual (Aa) were crossed with another heterozygous individual (Aa), what is the chance that their offspring would have a heterozygous genotype? A) 0% B) 50% C) 75% D) 100%
What is (B) 50%
500
Which of the following mutations would be MOST LIKELY to improve the chances that an organism would survive and reproduce. A) a stronger scent that makes an animal easier to find B) a weaker scent that makes a flower less attractive to bees C) weaker eyesight that makes an animal less likely to find prey D) stronger leg muscles that allow an animal to jump away from danger.
What is (D) stronger leg muscles that allow an animal to jump away from danger.
500
When population increases, resource depletion may bring about: A) exponential growth B) straight-line growth C) increased competition D) decreased competition
What is (C) increased competition
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