17 Biology 101 questions that I’m not sure of
1. Speciation has occurred when organisms in one population do not recognize the mating call of another population and as such, mating does not occur.TrueFalse2. When insulin enters muscle cells, it triggers the insertion of glucose transporters in the membrane and allows glucose to move into the cells.TrueFalse3. In a study reported in the news, “Researchers found that adults who used headphones with a screen, for more than one hour per day were at a 13% higher risk for hearing loss compared to those who used headphones with their screens less than one hour. The research team randomly surveyed 3,506 people in California about their screen/headphone behaviors, as well as information about ear infections and other noises a person may encounter at work and in daily life. Participants were also given physical check-ups, including a hearing test and a physical exam of the ears and eyes. The increased likelihood of hearing loss remained, even after the researchers adjusted for risk factors such as construction noise and inner ear anatomy. The researchers found no increased risk among people who used headphones with a screen less than one hour per day.4. Which of the following attributes was NOT part of the study’s research design and, thus, a weakness of the study?Collecting data from a large sample size.Randomly assigning participants to control and experimental groups.Randomly sampling adults.All of the above.5. How many of the following can freely diffuse across cell membranes, given what we learned in class?nucleotides (building blocks of DNA)proteinschloride ionsestrogennone of the aboveonly one of the aboveonly two of the aboveonly three of the aboveall four of the above6. When a female dog is spayed, they no longer menstruate. This is because veterinarians surgically remove their uterus, oviducts, and ovaries. Given this, which of the following hormones would you expect to be dramatically reduced in a spayed dog?ProgesteroneEstrogenLuteinizing hormoneProgesterone and estrogenAll of the above7. When a plant absorbs CO2 and releases O2 during photosynthesis:The process increases the mass of the plant.the process decreases the mass of the plant.the process does not affect the mass of the plant.8. Homologous chromosomes:Form tetrads when they line up during metaphase of mitosisContain the same sequence of genesAre present together in a single cell after the first meiotic divisionAre identical to each othertwo of the above are truenone of the above are true9. Many identical-looking frogs are living in the same pond, but your friend tells you that she thinks there are actually two different species of frogs instead of one.How many of the following could be the explanation for frogs living in the same pond being of two different species?Habitat isolationMechanical isolationTemporal isolationGametic isolationBehavioral isolationReduced hybrid viability0 of the above1 of the above2 of the above3 of the above4 of the above5 of the above6 of the above10. Alejandra is asked to make very short proteins, consisting of only 2 amino acids each and make as many variations as possible (examples: Phenylalanine-Leucine or Glycine-Glycine). She has 20 different amino acids she can use. How many different short proteins (consisting of 2 amino acids) can she make?42040604008,000none of the choices are correct11. Which of the following are necessary for speciation to take place?Environmental changeNatural selectionEvolutionAll of the above12. You are somewhere within a cell, but you don’t know where. You look around and see mRNA, proteins, and water. Where are you? One or more answers may be correct, so choose all that apply.in the nucleusin the cytoplasmbetween the two layers of the phospholipid bilayernone of the above13. Earlier this month, Pfizer announced that its novel coronavirus vaccine was 90% effective and that they were going to apply for emergency use authorization from the Food and Drug Administration.One of the reported potential side effects of the vaccine is pain, swelling, and redness in the area where the vaccine is administered for 24-48 hours after receiving the vaccine.Which best describes why this side effect is actually a good thing in patients who receive this vaccine?Because B cells start producing antibodies 24-48 hours after vaccine exposureBecause the innate immune system becomes activated immediately after vaccine exposureBecause coronavirus-specific cytotoxic T cells kill infected cells 24-48 hours after vaccine exposureTwo of the above are correctNone of the above are correct14. Which of the following is NOT a shared characteristic of photophosphorylation and oxidative phosphorylation?Both help decrease the amount of greenhouse gasses in the atmosphereBoth utilize a proton gradient established by an electron transport chain to power ATP synthaseBoth involve molecules becoming reduced and oxidizedBoth use high-energy electron carriers to shuttle electrons within organelles of the cellBoth can be performed by plants15. A typhoon ravaged Pingelap island in the late 18th century and killed a number of the island’s inhabitants. Approximately 20 people survived to replenish the isolated island’s population.Roughly 4 generations after the typhoon, the citizens of Pingelap began exhibiting symptoms of a rare recessive disorder known as Achromatopsia. Achromatopsia is characterized by extreme light sensitivity, poor vision, and complete inability to distinguish colors.Of the roughly the 3000 people living in Pingelap today, 36% are neither carriers of the disease allele nor affected by the disease. Given this, what % are affected with this rare disorder?16. In an imaginary snipe population at Hardy-Weinberg equilibrium, where L = long nose and l = short nose, the frequency of the recessive allele is 0.2. If L is incompletely dominant to l, what percentage of the population of snipes have medium-length noses? Just write the number (out of 100) of the % and do not include the % sign17. In a diploid organism, 2n=28. How many tetrads would be present in this cell in metaphase of mitosis? Just enter the number with no units
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