Question3.The sexually transmissible disease syphillis has become…3.????The sexually transmissible disease syphillis has become increasingly resistant ??????o treatment with antibiotics.?hat is the most likely scientific explanation??(a) The syphillis bacteria learned to avoid antibiotics(b) The syphillis bacteria changed ?heir genes when they sensed antibiotics(c) Antibiotic-sensitive syphillis bacteria died out, but antibiotic-resistant gonorrhea bacteria have flourished and persisted (d) The antibiotic increased the mutation rate in the syphillis bacteria (e) both b and d?.????Which statement best describes the relationship between plants and animals on earth? ?a) Plants produce O2 and sugars from CO2(b) Animals produce CO2 and H2O from sugars and O2(c) Plants produce O2 and sugars and animals produce CO2 and H2O(d) Animals produce O2 and sugars and plants produce CO2 and H2O?5. ????hink of the cell as a factory, in which the organelles are specialized sites of production. All cells have a power plant, the mitochondrion.?lant cells have an additional “reactor” for the production of usable energy. It is called the _____. ???(a) golgi body?????????b) rough endoplasmic reticulum?????????c) central vacuole?????????d) vesicle?????????e) chloroplast?6. ???? researcher planted seeds from four types of wheat (Types A, B, C, and D) in a greenhouse to determine which type of wheat grew fastest.?he plants were grown for 10 days and measured.?he results are shown below.?Choose the data set that demonstrates that Type C wheat grew the fastest.(a)? = 20 cm, B = 11 cm, C= 5 cm, D= 2 cm. (b)? = 2 cm, B = 5 cm, C= 1 cm, D= 2 cm. (c)? = 22 cm, B = 11 cm, C= 25 cm, D= 4 cm. (d)? = 30 cm, B = 12 cm, C= 28 cm, D= 1 cm. (e)? = 21 cm, B = 12 cm, C= 20 cm, D= 15 cm. ?se the following information to answer questions 7 & 8 below.? group of medical researchers recently investigated the effects of Drug X on lowering blood pressure in a group of hypertensive middle-aged women. The researchers did the following experiment and obtained the indicated results:?ne group of 150 women took a tablet containing Drug X for 3 weeks – 95 of these women decreased their blood pressure by at least 10% (three women from this group dropped out of the study).?nother group of?50 women was given a tablet with no added Drug X for 3 weeks – 10 of these women decreased their blood pressure by at least 10% (two women from this group dropped out of the study).?hich of the following was the control group in this experiment?a.???the group of participants that received tablets containing Drug X.b.???he group of participants that received tablets that did not contain Drug Xc.???the number of participants in each group at the beginning of the experimentd.???he number of participants in each group at the end of the experimente.???the amount of Drug X contained in the tablet?Which of the following is the most reasonable and accurate conclusion based on the results obtained in this experiment?a.???Drug X is good for hypertensive women.b.???rug X is good for both men and women.c.???Hypertensive women receiving Drug X for 3 weeks may show a decrease in blood pressure.d.???ypertensive women receiving Drug X for 3 weeks may show an increase in blood pressure.e.???Drug X has no effect on blood pressure.??Fill in the Blanks:?.???? You find a cell of a type you have never seen before.?he cell has both no nucleus and no mitochondria.?herefore, you conclude, it must be a _______________ cell. ????????????(a) prokaryotic????????????b) liver????????????c) animal????????????d) bacterial????????????e) plant?10.???A scientific theory _____________________. ????a)?s an experiment performed by scientists to understand their ??????observations of nature?????????(b) is an observable fact in nature?????????(c) is an explanation of many observations of nature?????????(d) is an educated guess?????????(e) is an absolute truth that cannot be challenged or changed upon ????????????xamination of new evidence?A substance with a pH less than 7 is ___________, while a substance with a pH greater than 7 is ___________.? ) basic, acidicB ) acidic, basicC ) basic, neutralD ) neutral, acidicE ) neutral, basic?12.? dog gets many nutrients from its food including amino acids. Which of these can be builtdirectly using the amino acids _________________________.? ) proteinsB ) carbohydratesC ) lipidsD ) nucleic acidsE ) glucose?3.???What is the correct sequence of steps in the scientific method??.?????ake observations and ask a questionII.????nalyze?he dataIII.???Develop a hypothesisIV.???Share the results with other scientistsV.????esign and perform an experiment to test the hypothesis13524?)????>II > III > IV > VB)????II > I > V > II > IVC)????> IV > III > II > ID)????> III > V >II > IVE)???? > II > I > III > IV?4.???You have formulated a hypothesis: “Apples contain more vitamin C than oranges.”To test your hypothesis you measure vitamin C levels in 20 oranges and 20 apples from trees that were grown in the same orchard under the same environmental conditions (temperature, rain, sunlight). This experiment was conducted twice. The control in the experiment isA)?ype of soil, temperature, amount of rain and sunlight in the orchardB) vitamin C levels C) orangesD) applesE) a large sample size and repeated experiment?se below paragraph for next two questions:? group of medical researchers investigated the effects of Drug X on lowering cholesterol levels in a group of men between the ages of 50 and 70 years old. The researchers did the following experiment and obtained the indicated results:?ne group of 150 men took a tablet containing Drug X for 3 weeks – 95 of these men decreased their cholesterol levels by at least 10% (three men from this group dropped out of the study).?nother group of?50 men was given a tablet with no added Drug X for 3 weeks – 10 of these men decreased their cholesterol levels by at least 10% (two men from this group dropped out of the study).?5.???Which of the following is the best hypothesis for this experiment? A)????ill drug X lower cholesterol levels in men between the age of 50 and 70 years? B)????rug X will lower cholesterol levels in men.C)????ince high cholesterol levels significantly increases several health risks for men, drug X is most likely beneficial. D)????en between the age of 50 and 70 years will have reduced cholesterol levels if they take drug X over a 3 week period. E)????here is no significant difference in cholesterol levels between men that take drug X and those that don’t take it. ?6.???Which of the following was the control group in this experiment?A)????he amount of Drug X contained in the tabletB)????he number of participants in each group at the end of the experimentC)????he group of participants that received tablets containing Drug XD)????he group of participants that received tablets that did not contain Drug XE)????he number of participants in each group at the beginning of the experiment?7. Where does the oxygen gas produced during photosynthesis come from?A)????aterB)????TPC)????arbon dioxide (CO2)D)????lucoseE)????he atmosphere?8.???Which of the following are polysaccharides?A)????NA and DNAB)????lucose and sucroseC)????holesterol and vegetable oilD)????lycogen and starchE)????denine and thymine?9.? chemotherapy drug affects the enzyme DNA polymerase. In which part of the cell cycle does it inhibit cell division?A)????etaphaseB)???? phaseC)????1D)????ytokinesisE)????rophase?0.???The majority of climate scientists believe that the current change in climate is caused predominantly by ________.A)????n enhancement of the greenhouse effectB)???? decreased reliance on fossil fuels for energyC)???? thinning of the ozone layerD)?????elting of the polar ice capsE)????n increase in solar radiation?1.???The liver cells of an animal have 24 chromosomes.?ow many chromosomes would you expect in this same animal?A)????B)????2C)????4D)????6E)????8?2.???You are taking a cruise from California to Hawaii. About halfway there the ship begins to sink. You are able to board a lifeboat, but now you are floating in the ocean waiting to be rescued. After several days you are so thirsty that you bend over the side of the boat and drink lots of salty seawater. What happens to your body? A)????ou throw up because sea salt is toxic to humans.B)????ou get thirstier because of osmosis.C)????alt diffuses into your cells, water follows, your cells start to expand and you feel bloated.D)????ince sea water consist of 96.5% fresh water (and only 3.5% salt) you will feel much better.E)????ou get dehydrated because water is unable to cross the semi-permeable membranes of your cells.?3.???You are spraying your garden with a pesticide and you accidentally swallow a small amount. ?ou read on the package that this pesticide inhibits ATP synthase. Should you be worried? A)????TP synthase is part of the light dependent reaction in photosynthesis; this pesticide will therefore not affect humans. So don’t worry!?)????TP synthase is an enzyme involved in the citric acid cycle so all animals, humans included, will be affected. Call the doctor. C)????TP synthase found in the pesticide is a very toxic compound. Call the doctor.D)????TP synthase is involved in both photosynthesis and cellular respiration. Call the doctor.E)????TP synthase inhibitors will not affect humans, but there might be other toxic ingredients in the pesticide, so it is best to call the doctor to be on the safe side. ?4.???In the following chemical reaction, what is carbon dioxide (CO2)?12 H20 + 6 CO2??->??1 glucose molecule + 6 O2A)????ubstrateB)????roductC)????nzymeD)????ctivation factorE)????ndependent variable?5.???Which of the following is NOT a feature of DNA?A)????denine (A) forms a base pair with thymine (T)B)????omplimentary strands are anti-parallel, running in opposite directionsC)????omplimentary strands are held together by hydrogen bonds between phosphate groupsD)????ucleotides within a single strand are connected by covalent bonds E)????ll of the above are features of DNA?6.???A man who carries a harmful sex-linked gene on his X chromosome, will pass the gene on toA)????ll of his daughtersB)????alf of his daughtersC)????ll of his sonsD)????alf of his sonsE)????ll of his children?7.???A double-stranded DNA molecule that has 22% guanine will haveA)????8% thymineB)????2% cytosineC)????4% adenineD)????6% uracilE)????oth A and B are correct?8.???Which of the following variations could be subject to natural selection?A)???? dog with short legs due to malnutrition is able to crawl into holes better than his litter matesB)???? tree is not infested by a ground-dwelling beetle when the homeowner cuts the lower branchesC)???? hyena is born with a spotted fur pattern that allows it to hide in the grass better than his litter matesD)???? pigeon learns that when its keeper comes near it will be fedE)????ll of these variations may be acted on by natural selection?9.???The ability of fireflies and angler fish to produce light is an example of convergent evolution. What can you conclude about these two animals based on this information?A)????hey share a recent common ancestorB)????hey are both adapted to environments low in lightC)????he ability to produce light is an ancient traitD)????hey are found in the same locationE)????ll of the above?0.???You observe the following outside your window:? grasshopper is munching away on a leaf when a hawk swoops down and eats the grasshopper. What is the grasshopper in this situation? ?)????secondary consumerb)????preyc)????herbivored)????parasitee)????both B and C ?1.???Which of the following statements is *NOT* true?a)????The cells resulting from meiosis are diploid and the cells resulting from mitosis are haploid.b)????Meiosis and mitosis both start with one cell, but meiosis ends with four and mitosis with two.?)????Mitosis produces new cells for growth and repair, meiosis produces gametes.d)????Mitosis goes through cytokinesis once, meiosis goes through cytokinesis twice.e)????Cross over happens in meiosis, but not in mitosis.?2. All of the following are sign that a website contains reliable scientific information EXCEPTA.????he site avoids anecdotal evidenceB.????he site backs up its claim with references to primary resourcesC.????he site is set up to allow you to buy the product being describedD.????he site is frequently updated to incorporate more recent informationE.????The site is maintained by a reputable medical establishment?3. Which statement best describes the relationship between plants and animals on earth?A.????lants produce O2 and sugars from CO2B.????nimals produce CO2 and H2O from sugars and O2C.????lants produce O2 and sugars and animals produce CO2 and H2O D.????nimals produce O2 and sugars and plants produce CO2 and H2OE.????Animals produce only O2 and plants produce only CO2.?4.???The flow of genetic information is from:(a)????NA to DNA to proteins(b)????roteins to DNA to RNA(c)????NA to RNA to Protein(d)???Protein to RNA to DNA(e)????hese three compounds are unrelated?5.???The process of converting DNA into an mRNA intermediate is called:(a)????ranslation(b)????ranscription(c)????onjugation(d)???transformation(e)????ransduction?6.???The conversion of the RNA code into a polypeptide protein chain is called:(a)????ranslation(b)????ranscription(c)????onjugation(d)???transformation(e)????ransduction?7.???The use of biological sciences to manipulate organisms or specific genes inside organisms is called:(a)????adiology(b)????rnithology(c)????iotechnology(d)???radiology(e)????ymbology?8.???In this type of horizontal DNA transfer between two bacteria, the genetic material is delivered by the help of a bacteriophage (virus).(a)????ranslation(b)????ransduction(c)????onjugation(d)???transformation(e)????ranscription?9.???One theory which explains why cloned animals cannot live as long or as healthy as the original is:(a)????hey are not created from an egg and a sperm(b)????he DNA is tangled up and never straightens out into full chromosomes(c)????he proteins are all folded incorrectly(d)???the telomeres (ends of the chromosomes) are shortened and this is thought to lead to premature aging and senescence.(e)????one of the aboveScienceBiologyBIO 101/102Share Question
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