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Week 2 HSA questions

Week 2 HSA questions. April 16-April 20. Question 10. Which of these supply the main energy source used in cellular respiration ? lipids amino acids nucleic acids carbohydrates. Question 11.

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Week 2 HSA questions

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  1. Week 2 HSA questions April 16-April 20

  2. Question 10 Which of these supply the main energy source used in cellular respiration? • lipids • amino acids • nucleic acids • carbohydrates

  3. Question 11 A researcher is testing the effect of acid rain on living organisms. She takes a tissue sample and places it in acid rainwater, which decreases its pH. As the pH decreases, what will most likely happen to the enzyme reaction rates in the cells of this tissue? • They will increase. • They will decrease. • They will stay the same. • They will increase and level off.

  4. Question 12 Scientists have recently discovered a new species that lives attached to the side of a tree. An organism from this new species • is multicellular • has cell walls • has vascular tissues • makes its own food • has structures that absorb moisture from the air Which of these is not true about cells in the new organism? • They contain nuclei. • They use vacuoles for storage. • They contain mitochondria. • They use pseudopodia to move.

  5. Question 13 A scientist is trying to discover a new treatment to stop cancer cells from dividing. In the cancer cells, which of these processes will stop if the treatment is successful? • mitosis • chemosynthesis • binary fission • genetic recombination

  6. Question 14 Which of these is not a direct function of the skeletal system? • blood circulation • muscle attachment • support of the body • protection of the organs

  7. Question 15 Use the description of the experiment below to answer the following.A student washes her hands with antibacterial soap and water. Then she touches the agar in a petri dish with her thumb. The agar contains nutrients that support the growth of bacteria. Other students repeat the procedure after washing their hands with three different kinds of antibacterial soap. The petri dishes are kept warm overnight to allow bacteria to grow. The next day the students count the number of bacterial colonies in each dish.What should be the effect of the soap in this experiment? • It should be toxic to the bacteria. • It should help the bacteria to grow. • It should change the pH of the agar. • It should destroy the nutrients in the agar.

  8. Question 16 Many bacteria live in fresh water. Which of these statements best describes what will happen when freshwater bacterial cells are placed in salt water? • Water leaves the cell, causing the cell to expand. • Water leaves the cell, causing the cell to shrink. • Water enters the cell, causing the cell to expand. • Water enters the cell, causing the cell to shrink.

  9. Question 17 A summer camp was built near a lake in the mountains. The campers used the lake for swimming, fishing, and boating. The relationships between three organisms found in the lake are shown below. Which of these fish cell structures would be most directly affected by a change in the oxygen level of the lake? • mitochondrion • chloroplast • golgi apparatus • endoplasmic reticulum

  10. Question 18 Specialized cells in the rafflesia flowers undergo a process that produces gametes. What is this process called? • binary fission • meiosis • fertilization • enzyme regulation

  11. Question 19 Most organisms need oxygen for their cells to function normally. In mammals, two organ systems work together to move oxygen throughout the body.The respiratory system brings oxygen into the body from the environment. Which of these body systems is directly involved in the delivery of oxygen to the major organs of the human body? • the nervous system • the digestive system • the endocrine system • the circulatory system

  12. Question 20 Most carbohydrates in the human body are • used as building blocks for proteins • used as catalysts for reactions in cells • consumed as a source of energy • not easily absorbed into the bloodstream

  13. Question 21 Hemoglobin is an important protein in red blood cells. The DNA code for hemoglobin contains the following segment: TGC-GGA-CTC-CTC Which of these is the messenger RNA code for this segment of DNA? • ACG-CCT-GAA-GAA • TCC-GGT-CTC-CTC • ACG-CCU-GAG-GAG • UGC-GGA-CUC-CUC

  14. Question 22 Which of these is produced as a result of fertilization? • a zygote with twice the number of chromosomes as a gamete • an egg with half the number of chromosomes as a zygote • a gamete with twice the number of chromosomes as a zygote • a zygote with half the number of chromosomes as a gamete

  15. Question 23 Starch turns blue-black in the presence of iodine solution. A selectively permeable dialysis sac containing a starch solution is placed into a beaker of iodine solution. If the dialysis sac is permeable only to water and iodine, what will the solutions in the beaker and the sac look like after two hours? • The iodine solution in the beaker will turn blue-black; the starch solution will not change. • The starch solution in the dialysis sac will turn blue-black; the iodine solution will not change. • Neither solution will turn blue-black. • Both solutions will turn blue-black.

  16. Question 24 In the early 1900s, many children had a disease called rickets. Research showed that the children had a deficiency of a vitamin that is necessary for the proper formation of bones.Which of these vitamins was lacking in the diets of these children? • vitamin A • vitamin C • vitamin D • vitamin K

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