ap bio final semester one

The figure above shows a model of a ligand precursor being cleaved to produce an active ligand that binds to a specific receptor. Which of the following is most likely to reduce the binding of the active ligand to its receptor?

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Which of the following conclusions is most consistent with the results of the experiment?

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Which of the following is the most likely result of the results?

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Based on the diagram, which of the following most likely contributes to the specific expression pattern of gene X?

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The electrophoretic seperation of the pieces of DNA in each of the four samples was acheived because of the differential migration of the DNA fragments in an electric field. This differential migration was caused by the

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Which of the following modifications of the DNA of the DNA would produce the greatest change in the primary structure of the polypeptide chain?

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If the scientist had forgotten to use DNA ligase during the preparation of the recombinant plasmid, bacterial growth would most likely have occurred on which of the following?

1 and 4

If no new mutations occur it would be most reasonable to expect bacterial growth on which of the following plates

1234

Which of the following best expresses the probability that the couples first son will be affected with the disorder?

50%

The mRNA transcribed from the DNA would read...

AUC

Given that equal amounts of the different mRNA's were injected into fertilized frog eggs, which of the following conclusions is most consistent with the electrophoresis results?

B-hemoglobin mRNA is translated more efficiently than is A-hemoglobin mRNA

Cell communication is critical for the function of both unicellular and multicellular eukaryotes. Which of the following occurs in all species of living organisms and may lead to an increase in genetic variation?

Cell communication is critical for the function of both unicellular and multicellular eukaryotes. Which of the following is true of cell signaling?

The process depicted in the image above is best summarized by which of the following descriptions?

During meiosis, crossing over leads to recombination of alleles between homologous chromosomes.

Which of the following claims is best supported by the data?

Gene A promotes neuron development, gene B promotes progammed cell deathin neuronal precursors

Based on the figure above, which of the following correctly describes the regulation of the Trp operon?

In the presence of tryptophan, the repressor is active and binds to the Trp operator preventing RNA polymerase from transcribing the operon

Based on the data in table one, which of the following best explains why there are no individuals with constricted pods in the F1 generation?

Inflated pod shape is dominant to constricted pod shape

Which of the following observations about inheritance in pea plants could be explained only after the discovery that genes may be linked on a chromosome?

Most offspring of a given cross have a combination of traits that is identical to that of either one parent or the other

which of the following occurs in all species of living organisms and may lead to an increase in genetic variation?

Mutations in the genome

A new mutation that arose in one copy of gene X in a somatic cell resulted in the formation of a tumor. Which of the following pieces of evidence best describes how the new mutation directly caused the tumor?

Protein X normally stimulates cell division, and the mutation created an overactive version of protein X

Which of the following explains this observation?

Recombination between the leaf shape and flower color genes resulted in chromosomes carrying a dominant allele of both genes

Which of the following best explains how the gene encoding cholera toxin becomes part of the bacterial genome?

The bacteriophase inserts the toxin gene into the host cell DNA and the gene is expressed with the rest of the host cells genes

Which of the following normally leads to the production of functional mRNA in eukaryotic cells?

The removal of portions of RNA known as intervening sequences

In which pf the following would there not be a change in the amino acid sequence of the amino acid sequence of the peptide coded for by this DNA?

changing AAA to AAG

If chemical signals in the cytoplasm control the progression of a cell to the M phase of the cell cycle, then fusion of a cell in G1 with a cell in early M phase would most likely result in the

condensation of the chromatin in preparation of nuclear division in both cells

Which of the following is supported by the data?

genes for the two traits are located close together on the same chromosome, and crossing over occured between the two genes loci.

In table one, the ratio of phenotypes in offspring from the testcross with F1 plants that had purple flowers and inflated pods suggests that the genes for flower color and pod shape are located

on different chromosomes

Which of the following best describes the structure of the viral genome?

single stranded DNA

Which of the following is the best justification for why the rabbit hemoglobin proteins were found throughout the tadpole?

the mRNA injected into the newly fertilized frog eggs is distributed in the cytoplasm of every daughter cell during cell division

Which of the following provides the best justification in the computer simulation?

the purple allele is dominant to the white allele because all the offspring from the cross of purple flowered and white flowered plants had purple flowers

The scientist used restriction enzymes for what purpose in the experiment?

to make cuts in the plasmid DNA

The DNA was labeled with 32P in order to

visualize the fragments