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Use the graph to answer the question . The optimum pH of the enzyme is 6.6 

Use the graph to answer the question . The optimum pH of the enzyme is 6.6  The optimum pH of the enzyme is 5.8. The enzyme’s activity is greater around pH 8.0 than around pH 5.0.  The enzyme’s activity continually increases as pH increases from 5.0 to 9.0 .

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Use the graph to answer the question . The optimum pH of the enzyme is 6.6 

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  1. Use the graph to answer the question. The optimum pH of the enzyme is 6.6  The optimum pH of the enzyme is 5.8. The enzyme’s activity is greater around pH 8.0 than around pH 5.0.  The enzyme’s activity continually increases as pH increases from 5.0 to 9.0 

  2. Use the diagram to answer the question. A pedigree showing the inheritance of a gold dorsal stripe pattern in ball pythons is shown above. According to the pedigree, what type of trait is this stripe pattern in ball pythons? A.codominant B.polygenic C.recessive D.sex-linked

  3. A single nucleotide of DNA is composed of which of the following substances? A.adenine, guanine, and cytosine B.hydrogen, a phosphate group, and adenine C.ribose sugar, deoxyribose sugar, and thymine D.deoxyribose sugar, a phosphate group, and a nitrogenous base

  4. Use the chart to answer the question. A strand of mRNA containing the repeating sequence AAGAAGAAGAAG could code for which of the following amino acid sequences? A.lys-arg-glu-lys B.ser-ser-glu-glu C.lys-arg-lys-arg D.lys-lys-lys-lys

  5. Use the diagram to answer the question. The diagram represents the beginning and end products of a process that occurs in the nucleus of a cell. Which process does the diagram represent? A.recombination B.replication C.transcription D.translation

  6. Use the diagram to answer the question. A biological process is represented in the diagram. Which of the following concepts is best illustrated by the diagram? A.Crossing-over creates new genetic diversity in gametes. B.Mitosis increases the number of chromosomes in zygote cells. C.In asexual reproduction, the offspring produced are genetically identical to the parent. D.In sexual reproduction, the offspring receive the same number of chromosomes from each parent.

  7. A male and female both have blood type AB. If they have a child, what is the probability that the child will also have blood type AB? A.¼ B.½ C.¾ D.1/1

  8. Use the reaction equation to answer the question. H2O2(l)→ O2(g) + H20(l)This reaction equation represents the breakdown of hydrogen peroxide into oxygen gas and water. This reaction normally occurs slowly at room temperature but speeds up significantly when catalase is added to the hydrogen peroxide. Based on this information, which type of molecule is catalase? A.disaccharide B.enzyme C.Lipid D.DNA

  9. Use the diagram of a euglena to answer the question. Ben drew this diagram after viewing a euglena through a microscope. Which aspect of the euglena provides the best indication that this is a eukaryotic cell? • the euglena uses a flagellum to move • the euglena uses chlorophyll to make food • the euglena has a cell membrane • the euglena has a membrane bound nucleus

  10. Laurel uses the parts of a city to represent the different organelles. Which part of a city is the best comparison for mitochondria? A.storage unit B.city planning C.streets and highways office D.power plants

  11. The diagram shows the first few steps of meiosis. Which picture shows the final step of this process? A. B. C. D.

  12. Two parents are both heterozygous for attached earlobes, a simple recessive trait. What percentage of their children can be expected to have attached earlobes? A.0% B.25% C.50% D.75%

  13. While viewing a slide of rapidly moving sperm cells, a student concludes that these cells require a large amount of energy to maintain their activity. What organelles provide this needed energy? A.Vacuoles B.ribosomes C.Chloroplasts D.mitochondria

  14. You are given a sample of unknown human cells to examine. Analysis of their nuclei reveals that each cell contains 23 chromosomes. What types of cells might these be? A.ova (egg) B.skin C.Liver D.white blood cell

  15. Some cattle were given bovine growth hormone (BGH) to see if they would produce more meat. The animals were studied over a period of two years. Animals in Group A were injected with BGH. Animals in Group B were not injected with BGH. The table shows the results of the investigation. Which is a valid conclusion from this data? A. BGH does not bring about an increase in mass  B The more BGH injected into the animal, the faster its mass will increase  C. Animals injected with the hormone will increase in mass faster than those who are not injected  D. Animals injected with BGH will not increase mass as fast as animals that are not 

  16. Which cellular organelle is best described as a factory that builds proteins? A.Lysosomes B.ribosomes C.Chloroplast D.nucleus

  17. Use the diagram to answer the question. There are several distinct differences between prokaryotes and eukaryotes. Which organisms in the diagram would be classified as prokaryotes? A. bacterium B. only yeast C. only yeast and bacterium  D. diatom and yeast 

  18. A protein moves a molecule across a membrane. In the process, two molecules of ATP are used. This cellular process is an example of A. active transport because it uses energy  B. active transport because it is conducted by a protein  C. passive transport because it occurs across a membrane  D. passive transport because it does not generate ATP 

  19. Darnell views living red blood cells on a slide in a microscope. He adds a drop of a 10% salt solution to generate a hypertonic environment. Which statement best describes what happens to the red blood cells? A.the cells swell because water moves into the cells B.the cells shrink because water moves into the cells C.the cells swell because water moves out of the cells D.the cells shrink because water moves out of the cells

  20. In pea plants, tall (T) is dominant and short (t) is recessive. A homozygous dominant pea plant is crossed with a heterozygous pea plant. What are the expected genotypes of the offspring? A.100% Tt B.75% Tt C.50% TT, 50% Tt TT, 25% Tt D.25% TT, 50% Tt, 25% tt

  21. Which model illustrates the most common structure of DNA? A. B. C. D.

  22. Use the diagram to answer the question. A cell with 5% solute concentration is placed in beaker with a 1% solute concentration. What will happen to the cell over time? A. The cell will gain H2O and expand. B. The cell will lose H2O and shrink. C. The cell will both gain and lose equal amounts of H2O; it will remain the same size. D. The cell will undergo no exchange of H2O with its surroundings.

  23. Which statement correctly describes how DNA differs from RNA? A.DNA has two strands B.DNA codes for proteins C.DNA forms ribosomal subunits D.DNA has a sugar-phosphate backbone

  24. Which base sequence would be found in mRNA? A.AAA UUG GGG B.AAA TTG CCC C.CGC TTG AAA D.TCA AAA CGC

  25. The diagram above shows a pair of DNA nucleotides. The nitrogenous base guanine is labeled. Which nitrogenous base pairs with guanine? A.adenine(A) B.cytosine (C) C.thymine(T) D.uracil (U)

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