Hesi A2 Biology Exam With Questions And Answers

Which organelle is responsible for protein synthesis? - AnswerRibosome Why is yeast used to make bread rise? - AnswerYeast carries out fermentation, producing ethanol and carbon dioxide How is mitosis different from meiosis? - AnswerMeiosis creates sex cells with half the # of chromosomes of the parent cell where as mitosis creates cells that are exact copies of each other, down to the number of chromosomes What can be altered? - AnswerDNA What is single stranded? - AnswerRNA What contains uracil? - AnswerRNA What codes for proteins? - AnswerDNA Imagine that two parents both carry the recessive gene for cystic fibrosis. Any homozygous recessive offspring will manifest the disease. What percentage of the offspring is predicted to be carriers but not manifest the disease? - Answer50 percent A cell is in a solution in which the concentration of solutes is higher inside the cell than outside the cell. What would you expect to happen to the cell? - AnswerIt will swell and probably burst/hypotonic situation What is the purpose of phloem tissue in plant stems? - AnswerIt conducts food throughout the plant, it is the system of narrow tubes that transports sugars and other nutrients Physical factors such as temperature and pH can alter enzyme activity because they have an effect on the enzyme's - AnswerShape, the shape of an enzyme controls it's fit with its substrate. Which part of a plants reproductive system is of a different gender than others? - AnswerStamen (male reproductive organ) What kind of symbiosis exists between a pneumonia bacterium and a human? - AnswerParasitism, one organism benefits off another The scientific name for a house cat is Felis catus. This indicates the house cats what? - AnswerGenus; species Kingdom/animalia Phylum/Chordata Class/mammalia Order/carnivora Family/felidae Genus/ Felis Species/catus Beeswax is an example of what kind of molecule? - AnswerLipid, waxes oils and fats are lipids What takes place in a lysosome? - AnswerFood is digested, the lysosome contains digestive enzymes. The job of a lysosome is to digest food for cells and break down cells waste products Which organism reproduces via binary fission? - AnswerSalmonella In which phase of cell division do the chromosomes replicate? - AnswerInterphase-active phase of a cells reproductive life, the cell produces nucleic acids and proteins and doubled its # of chromosomes In a strand of DNA, you would expect to see adenine paired with? - AnswerThymine/adenine Cytosine/guanine Hemophilia is a sex linked trait carried on the X chromosome. In an example of a male with hemophilia and a female carrier, what ratio of the offspring is predicted to have the disease? - Answer1 female: 0 male What is represented by this formula 6CO2+6H2O=C6H12O6+6O2 - AnswerPhotosynthesis, carbon dioxide pairing with water to form a simple sugar and oxygen 3 students measured the mass of a product of combustion. They recorded measurements of 5.14g 5.16g and 5.17g if the known mass of the product is 5.30g how would you describe the students measurements? - AnswerPrecise What is the energy pyramid? - AnswerProducersprimary consumerssecondary consumersdecomposers Which is not a step in the water cycle? - AnswerNitrification(nitrogen cycle)