Cell Structure and Function
Quiz by Kourtney Squires
Grade 9
Science (2010) (Archived)
Texas Essential Knowledge and Skills (TEKS)
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11 questions
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- Q1The 1918 influenza epidemic killed between 50 million and 100 million people worldwide. this epidemic happened near the end of World war I. More people died from the influenza epidemic than were killed in the war. Which of the following explains why this virus was so deadly worldwide?Infected soldiers returning from the war spread the virus when they coughed.All of the answer choices are correct.Food was scarce because of the war, so people were undernourished, and their immune systems were weakened.Medical personnel often became ill as a result of exposure to airborne virus particles.30s
- Q2Four different nucleotides are used as building blocks of DNA. Which of the following can be used to distinguish one nucleotide from another?The type of fatty acidThe shape of the deoxyribose sugarThe length of the phosphate groupThe nitrogenous base30s
- Q3In the early 1900s, a scientist hypothesized a link between DNA and the production of proteins in the cytoplasm. However, the fact that DNA could not be found outside the nucleus led scientists to believe that another substance was also involved in the synthesis of protein in the cytoplasm. In the 1940s, scientists performed an experiment that ultimately identified the site of protein synthesis. They also identified the molecule responsible for transporting information from the nucleus to the site of protein synthesis. What was this newly identified molecule?A genemRNAThymineATP30s
- Q4As a fertilized egg divides, the cells differentiate because they -metabolize sugars rapidlyhave specific genes activatedcan clump togethercontain a lipid bilayer30s
- Q5The diagram shows cells in different phases of mitosis. A student is trying to find a cell in a particular phase of mitosis. The student is looking for evidence that spindle fibers are separating the chromosomes to ensure that each new nucleus has one copy of each chromosome. Which cell in the phase of mitosis is the student looking for?Cell 2Cell 1Cell 3Cell 430s
- Q6This diagram shows cellular activity across a cell membrane. Which two processes does this diagram most directly model?Transport of molecules and energy conversionsEnergy conversions and synthesis of new moleculesHomeostasis and transport of moleculesSynthesis of new molecules and homeostasis30s
- Q7Cells pass through a G2 checkpoint before entering mitosis. Ideally, if DNA damage is detected, the cells do not enter mitosis until the damage is repaired. Why is DNA damage repaired before cells enter mitosis?So that the chromosomes can align at the metaphase plate during mitosis.So that the cytoplasm can be divided equally between the two daughter cells.So that another round of DNA synthesis does not have to take place.So that healthy daughter cells are produced, allowing the organism to continue growing.30s
- Q8The picture shows a 3-D model of a virus called a bacteriophage. Bacteriophages can infect bacteria such as E. coli. In what way are the bacteriophages and E. coli alike?They reproduce by mitosis.They lack membrane-bound organelles.They contain antibodies.They have identical genomes.30s
- Q9The complex carbohydrates pictured below are made by linking molecules of glucose. in all three complex carbohydrates, the subunits of glucose are bonded together differently. Because they have different structures, they most likely -carry different nucleotidesperform different functionsform different proteinscontain different chemical elements30s
- Q10The table lists and describes three types of cells from prepared slides that students observed with a microscope. Which of these sets of slides could students have used for their observations?Squamous cell = ovum; Erythrocyte = white blood cell; Gamete = skin cellSquamous cell = cheek cell; Erythrocyte = red blood cell; Gamete = sperm cellSquamous cell = red blood cell; Erythrocyte = white blood cell; Gamete = sperm cellSquamous cell = cheek cell; Erythrocyte = skin cell; Gamete = ovum30s
- Q11Oncogenes are mutated forms of genes. Oncogenes can transform a cell into a tumor cell. Some tumor cells are benign, while others are malignant. How does the presence of an oncogene lead to the formation of a tumor?Somatic cell growth is inhibited.Cell division is unregulated.Antibody activity is unregulated.ATP production is inhibited.30s
