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Semester 1 Exam Practice Questions (with Answers) Other review resources available:

Semester 1 Exam Practice Questions (with Answers) Other review resources available: Semester Exam Review Session (see the live lesson calendar for this weekly session) Live Lessons (see the live lesson calendar for sessions that focus on particular lessons)

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Semester 1 Exam Practice Questions (with Answers) Other review resources available:

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  1. Semester 1 Exam Practice Questions (with Answers) • Other review resources available: • Semester Exam Review Session (see the live lesson calendar for this weekly session) • Live Lessons (see the live lesson calendar for sessions that focus on particular lessons) • Biology Help Center (red link on the announcement page). There are Guided Notes and Review worksheets for each module, recordings for some lessons, and a Semester Exam Study Guide • In Addition (note that these resources are for the full course and so would cover semester 2 as well: • Biology EOC review at: http://www.flvs.net/areas/studentservices/EOC/Pages/biology.aspx • Shmoop Biology EOC Practice Exams and lesson review: • https://docs.google.com/document/d/1ENMgQ2An1vsljZGxdUlSwCJRNNwdh0lu0NgLQR2ZvWo/edit?usp=sharing

  2. 1.02 The Rugose Rose is a halophilic shrub, meaning that it grows well in saline (salty) soil. Leah wants to test the effect of salinity level on the growth of Rugose Roses to determine an optimal level of salinity. She grows the roses in 3 different pots watering each with a different concentration of salt solution. She measures the growth of the plants daily for 2 weeks. Which of the following additions would best improve her experiment. Test different types of roses Take measurements for a longer period of time Add a control group that is watered with plain water Vary the amount of sunlight each is receiving as well

  3. The Rugose Rose is a halophilic shrub, meaning that it grows well in saline (salty) soil. Leah wants to test the effect of salinity level on the growth of Rugose Roses to determine an optimal level of salinity. She grows the roses in 3 different pots watering each with a different concentration of salt solution. She measures the growth of the plants daily for 2 weeks. Which of the following additions would best improve her experiment. Test different types of roses Take measurements for a longer period of time Add a control group that is watered with plain water Vary the amount of sunlight each is receiving as well

  4. 1.02 Cody is an animal lover and he is particularly fond of tropical birds. He is trying to decide on a topic for his 9th grade science fair project and has come up with the following list. Which would be his best choice and allow for scientific experimentation: Which of the following toucan species has the nicest voice: Green Aracari, Collared Aracari, or Emerald Toucanet? Out of the following tropical birds, which can learn the most words in a 10 day period: African Gray Parrot, Budgeriar, Indian Redneck? Out of the following tropical birds, which makes the best pet: African Gray Parrot, Scaly-Headed Parrot, or the Pink Cockatoo? Which of the following parrot species is the most attractive: African Gray Parrot, Amazon Parrot, Eclectus Parrot?

  5. Cody is an animal lover and he is particularly fond of tropical birds. He is trying to decide on a topic for his 9th grade science fair project and has come up with the following list. Which would be his best choice and allow for scientific experimentation: Which of the following toucan species has the nicest voice: Green Aracari, Collared Aracari, or Emerald Toucanet? Out of the following tropical birds, which can learn the most words in a 10 day period: African Gray Parrot, Budgeriar, Indian Redneck? Out of the following tropical birds, which makes the best pet: African Gray Parrot, Scaly-Headed Parrot, or the Pink Cockatoo? Which of the following parrot species is the most attractive: African Gray Parrot, Amazon Parrot, Eclectus Parrot? Note: Words like “nicest”, “best”, “attractive” indicate opinion – we can’t do a science experiment.

  6. 1.02

  7. 2.01 • As a result of catalyzing a chemical reaction, the enzyme : • Is turned into products • Remains unchanged • Is denatured • Replicates forming new enzymes

  8. As a result of catalyzing a chemical reaction, the enzyme : • Is turned into products • Remains unchanged • Is denatured • Replicates forming new enzymes

  9. 2.02 • If a cell membrane were only composed of the phospholipid bilayer, what is one problem that is likely to arise? • Lacking membrane proteins, large hydrophilic molecules would enter the cell more easily • There would be increased communication between the inside and outside of the cell • Without transport proteins, active transport would be unable to occur • There would be increased levels of protein within the cell.

  10. If a cell membrane were only composed of the phospholipid bilayer, what is one problem that is likely to arise? • Lacking membrane proteins, large hydrophilic molecules would enter the cell more easily • There would be increased communication between the inside and outside of the cell • Without transport proteins, active transport would be unable to occur • There would be increased levels of protein within the cell.

  11. 2.02 • A scientist discovers a single celled organism. After careful study he determines that the cell has ribosomes, a cell wall and the DNA is never enclosed in a nuclear membrane. What could the scientist correctly infer based on this information? • This is a eukaryotic cell because there are ribosomes • This is a eukaryotic cell because the DNA is not enclosed in a membrane • This is a prokaryotic cell because the DNA is not enclosed in a membrane • This is a prokaryotic cell because there are ribosomes

  12. A scientist discovers a single celled organism. After careful study he determines that the cell has ribosomes, a cell wall and the DNA is never enclosed in a nuclear membrane. What could the scientist correctly infer based on this information? • This is a eukaryotic cell because there are ribosomes • This is a eukaryotic cell because the DNA is not enclosed in a membrane • This is a prokaryotic cell because the DNA is not enclosed in a membrane • This is a prokaryotic cell because there are ribosomes

  13. A cell is lacking in RNA polymerase. What part of protein synthesis is most likely to be impacted? • Transcription because the DNA strands will not be able to separate • Translation because the DNA strands will not be able to join together • Transcription because the mRNA cannot join together without it • Translation because the tRNA depends on it to attach the amino acids

  14. A cell is lacking in RNA polymerase. What part of protein synthesis is most likely to be impacted? • Transcription because the DNA strands will not be able to separate • Translation because the DNA strands will not be able to join together • Transcription because the tRNA cannot join together without it • Translation because the tRNA depends on it to attach the amino acids RNA polymerase works during Transcription to separate the DNA strands and it puts together the mRNA

  15. 2.01 If amino acids were unable to polymerize: Complex carbohydrates like starch would not form The cell membrane lipid bilayer would be unstable There would be no enzymes to catalyze reactions Protein macromolecules would not form A. 1 and 2 are true B. 3 and 4 are true C. Only 4 is true D. Only 2 is true In the absense of fructose, which disaccharide would not form? Sucrose because it is made of one unit of glucose and one unit of fructose Lactose because it is made of one unit of galactose and one unit of glucose Lactose because it is made of one unit of galactose and one unit of fructose Maltose because it is made of one unit of fructose and one unit of glucose

  16. If amino acids were unable to polymerize: Complex carbohydrates like starch would not form The cell membrane lipid bilayer would be unstable There would be no enzymes to catalyze reactions Protein macromolecules would not form A. 1 and 2 are true B. 3 and 4 are true C. Only 4 is true D. Only 2 is true In the absense of fructose, which disaccharide would not form? Sucrose because it is made of one unit of glucose and one unit of fructose Lactose because it is made of one unit of galactose and one unit of glucose Lactose because it is made of one unit of galactose and one unit of fructose Maltose because it is made of one unit of fructose and one unit of glucose Maltose = glucose + glucose Sucrose = glucose + fructose Lactose = galactose + glucose

  17. 2.02 What type of cellular transport is being illustrated? Endocytosis Exocytosis Osmosis Diffusion

  18. What type of cellular transport is being illustrated? Endocytosis Exocytosis Osmosis Diffusion

  19. For dragons, green is the dominant color and purple is the recessive color. A heterozygous green dragon mates with a purple dragon. What is the chance that they will have purple baby dragons? What is the dominant trait: What is the recessive trait: What are the parents genotypes: What are the parents phenotypes: The 4 possible genotypes for the kids are: So what percentage are purple? 3.04

  20. For dragons, green is the dominant color and purple is the recessive color. A heterozygous green dragon mates with a purple dragon. What is the chance that they will have purple baby dragons? What is the dominant trait: green G G g What is the recessive trait: purple g g Gggg What are the parents genotypes: Gg x gg What are the parents phenotypes: green x purple g Gggg The 4 possible genotypes for the kids are: GgggGggg genotype percentages: Gg, 2/4 = 50% phenotype percentages: Gg will be green = 50% gg will be purple = 50% So what percentage are purple? 2 out of 4 so 50%

  21. 3.05 This chart shows mRNA ! DNA: TTC CAA ATC mRNA: Protein: Mutation – what happens if the last guanine in the mRNA incorrectly reads as cytosine?

  22. This chart shows mRNA ! DNA: TTC CAA ATC mRNA: AAG GUU UAG Protein: Lys Val Stop Mutation – what happens if the last guanine in the mRNA incorrectly reads as cytosine? The mRNA would be AAG GUU UAC and so instead of “stop” the amino acid would be Tyr

  23. Given the following mRNA sequence: CAUUUAUGC What would happen if the last cytosine were replaced with a adenine? The last amino acid would be a tryptophan instead of a cysteine Nothing would change since both codons code for cysteine The last amino acid would be a stop codon instead of cysteine The last amino acid would be a stop codon instead of valine.

  24. Given the following mRNA sequence: CAUUUAUGC What would happen if the last cytosine were replaced with a adenine? The last amino acid would be a tryptophan instead of a cysteine Nothing would change since both codons code for cysteine The last amino acid would be a stop codon instead of cysteine The last amino acid would be a stop codon instead of valine. mRNA: CAU UUA UGC protein: His LeuCys With mutation: CAU UUA UGA Protein: His Leu Stop

  25. Given the following RNA sequence: CACCGCGAU What would be the impact of a deletion mutation of the second arginine? The sequence would start the same but it would not be able to form the 3rd amino acid. The entire sequence would change because a deletion shifts all the codons Instead of Histidine, the 1st amino acid would be Proline No protein would form because a deletion prevents amino acid formation

  26. Given the following RNA sequence: CACCGCGAU What would be the impact of a deletion mutation of the second arginine? Original RNA: CAC CGC GAU His Arg Asp Mutated The sequence would start the same but it would not be able to form the 3rd amino acid. The entire sequence would change because a deletion shifts all the codons Instead of Histidine, the 1st amino acid would be Proline No protein would form because a deletion prevents amino acid formation

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