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2012 AP Biology Practice Exam Multiple Choice and Grid-In Questions Free Download

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部分真題預(yù)覽：

1）Membrane-bound organelles have been an important component in the evolution of complex, multicellular organisms. Which of the following best summarizes an advantage of eukaryotic cells having internal membranes?

1. Eukaryotic cells are able to reproduce faster because of the presence of organelles.
2. Some organelles, such as mitochondria and chloroplasts, are similar to prokaryotic cells in structure.
3. Organelles isolate specific reactions, increasing metabolic efficiency.
4. Compartmentalization leads to a higher mutation rate in DNA, which leads to more new species.

2)By discharging electric sparks into a laboratory chamber atmosphere that consisted of water vapor, hydrogen gas, methane, and ammonia, Stanley Miller obtained data that showed that a number of organic molecules, including many amino acids, could be synthesized. Miller was attempting to model early Earth conditions as understood in the 1950s. The results of Miller’s experiments best support which of the following hypotheses?

1. The molecules essential to life today did not exist at the time Earth was first formed.
2. The molecules essential to life today could not have been carried to the primordial Earth by a comet or meteorite.
3. The molecules essential to life today could have formed under early Earth conditions.
4. The molecules essential to life today were initially self-replicating proteins that were synthesized approximately four billion years ago.

5)Which of the following statements best supports the claim that organisms share fundamental processes as a result of evolution?

1. All organisms that are introduced into new environments have the capacity to fill vacant ecological roles.
2. All organisms have the ability to utilize oxygen to harness energy from the chemical breakdown of organic compounds.
3. All organisms share a genetic code organized into triplet codons, making it possible for one organism to express a gene from another organism.
4. All organisms possess structures such as chloroplasts and mitochondria within their cells that reflect past symbiotic relationships between prokaryotic precursors.

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2012 AP Biology Practice Exam（May） Multiple Choice and Grid-In Questions Free Download

2012 AP 生物五月模考選擇題部分免費(fèi)下載

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