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AP Biology

Subjects : science, ap, biology
Instructions:
  • Answer 50 questions in 15 minutes.
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  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. An extensive membranous network in eukaryotic cells - continuous with the outer nuclear membrane and composed of ribosome-studded (rough) and ribosome-free (smooth) regions.






2. The enzyme that catalyzes the first step of the Calvin cycle (the addition of CO2 to RuBP - or ribulose bisphosphate).






3. In a heterozygote - the allele that is completely masked in the phenotype.






4. A measure of how difficult it is to stretch or break the surface of a liquid






5. A mutation involving the addition of one or more nucleotide pairs to a gene.






6. An acceptor that temporarily stores energized electrons produced during the light reactions.






7. Any factor that has a greater impact on a population as the population increases






8. A substance that reduces the activity of an enzyme by entering the active site in place of the substrate whose structure it mimics.






9. A negatively charged ion






10. Special transport proteins that generate the voltage gradient across a membrane an example is the Na+-K+ pump restores the electrochemical gradient not only by the active transport of Na+ and K+ setting up a concentration gradien but because it pumps






11. A noncoding - intervening sequence within a eukaryotic gene.






12. Composed of nine sets of triplet microtubule arrange in a ring






13. A storage polysaccharide in plants consisting entirely of glucose.






14. An aberration in chromosome structure resulting from an error in meiosis or mutagens; duplication of a portion of a chromosome resulting from fusion with a fragment from a homologous chromosome.






15. A human genetic disease of red blood cells caused by the substitution of a single amino acid in the hemoglobin protein; it is the most common inherited disease among African Americans.






16. Nuclear division process; prophase - prometaphase - metaphase - anaphase - and telophse






17. That portion of the endoplasmic reticulum studded with ribosomes.






18. Having two identical alleles for a given trait.






19. Provide cytoplasmic channels between adjacent animal cells






20. A flattened membrane sac inside the chloroplast - used to convert light energy to chemical energy.






21. Collagen most abundant in animal cells






22. A special sequence of nucleotides in DNA that marks the end of a gene. It signals RNA polymerase to release the newly made RNA molecule - which then departs from the gene






23. Charts of chromosomes that locate genes with respect to chromosomal features.






24. Having aversion to water tend to coalesce and form droplets of water






25. Complex of DNA and proteins that makes up a eukaryotic chromosome






26. A family tree describing the occurrence of heritable characters in parents and offspring across as many generations as possible.






27. A spontaneous chemical reaction in which there is a net release of free energy






28. A subatomic particle with single positive charge found in nucleus of an atom






29. A type of lipid characterized by a carbon skeleton consisting of four rings with various functional groups attached.






30. Cytokenisis process; pinching of the plasma membrane; the succession of rapid cell division without growth during early embryonic development that converts the zygote into a ball of cell






31. Unit - a region of a DNA molecule that is transcribed into an RNA molecule






32. The range of a pigment's ability to absorb various wavelengths of light.






33. One of several formed bodies with specialized functions - suspended in the cytoplasm of eukaryotic cells.






34. The process of generating ATP from ADP and phosphate by means of a proton-motive force generated by the thylakoid membrane of the chloroplast during the light reactions of photosynthesis.






35. A long carbon chain carboxylic acid. vary in length and in the number and location of double bonds; three fatty acids linked to a glycerol molecule form fat.






36. A type of weak chemical bond formed when the slightly positive hydrogen atom of a polar covalent bond in one molecules is attracted to the slightly negative atom of a polar covalent in another bond






37. An organism that is heterozygous with respect to a single gene of interest. A monohybrid results from a cross between parents homozygous for different alleles. For example - parents of genotypes AA and aa produce a monohybrid genotype of Aa.






38. A basic principle in biology stating that genes are located on chromosomes and that the behavior of chromosomes during meiosis accounts for inheritance patterns.






39. The fluid of the chloroplast surrounding the thylakoid membrane; involved in the synthesis of organic molecules from carbon dioxide and water.






40. A type of RNA - synthesized from DNA - that attaches to ribosomes in the cytoplasm and specifies the primary structure of a protein.






41. Double membrane perforated by pores which regulate entry and exit of certain macromolecules and particles






42. Amphipathic molecules have both hydrophobic regions and hydrophilic regions <phospholipids>.






43. A fatty acid in which all carbons in the hydrocarbon tail are connected by single bonds - thus maximizing the number of hydrogen atoms that can attach to the carbon skeleton.






44. An aggregation of several ribosomes attached to one messenger RNA molecule.






45. A quantitative measure of disorder or randomness - symbolized by S.






46. Golgi appartus--> usually located near the ER a vesicle that buds from the ER will add its membrane and the contents of its lumen -cavity - to this face






47. A functional group present in aldehydes and ketones and consisting of a carbon atom double-bonded to an oxygen atom.






48. A type of photosynthetic cell arranged into tightly packed sheaths around the veins of a leaf.






49. A genetic map based on the frequencies of recombination between markers during crossing over of homologous chromosomes. The greater the frequency of recombination between two genetic markers - the farther apart they are assumed to be. See also geneti






50. A covalent bond formed between two monosaccharides by a dehydration reaction.