HESI A2 Biology Questions and Answers Already Passed

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HESI A2 Biology Questions and Answers Already Passed In the hierarchic system of classification which is the least inclusive? ✔✔Species After observing an event, you develop an explanation this... is: ✔✔Hypothesis A molecule of water is bonded with another molecule of water by what type of bond? ✔✔Hydrogen Which is a benefit of the intermolecular hydrogen bonding of water: ✔✔1- Water has a relatively high specific heat value. 2- Water has strong cohesive and adhesive properties. 3- Polarity of water allows it to act as a versatile solvent. Of all molecules that are significant to biology which are considered important: ✔✔nucleic acids Lipids are better known as fats but what are they specifically? ✔✔Fatty acids, phospholipids, steroids What are the 2 categories of fatty acids? ✔✔saturated fats and unsaturated fats How do phospholipids function in cells? ✔✔They are integral components of plasma membrane Which of the biologic molecules are considered the most significant contributor to cellular function? ✔✔Proteins Proteins are polymers of which? ✔✔Amino Acids Which of the following proteins catalyze different reactions or processes? ✔✔Enzyme Which of the biologic molecules are components of the molecules of inheritance? ✔✔Nucleic Acids What is the sum of all chemical reactions that occur in an organism? ✔✔Metabolism In a cell, reactions take place in a series of steps called: ✔✔Metabolic pathways What is the fundamental unit of biology? ✔✔Cell Which type of cell contains no defined nucleus? ✔✔Prokaryotic cell What is the primary purpose of the flagella on the surface of cells? ✔✔movement of the cell Which cell organelle functions to transport materials from the endoplasmic reticulum throughout the cell? ✔✔Golgi apparatus Which are the distant organelles that produce cell energy? ✔✔Mitochondrion and chlorophast Which component of the cell contributes to the protection, communication, and passage of substances into and out of the cell? ✔✔Cell Membrane The Cell Membrane consists of a bilayer of phospholipids which proteins, cholesterol, and glycoproteins. The bilayer creates a hydrophobic region between two layers of lipids, making it what: ✔✔Selectively permeable What are 2 catabolic pathways that lead to cellular energy production? ✔✔Fermentation and Cellular respiration What is the first step in the conversion of glucose to pyruvate? ✔✔Glycolysis Which step in cellular respiration yields the greatest amount of ATP? ✔✔Krebs Cycle During cell respiration, the conversion of glucose results in an overall production of how many ATP molecules? ✔✔32-36 What is the function of water in photosynthesis? ✔✔Supply electrons in the light reactions Cells produce by different process, all of which fall into what 2 categories? ✔✔Sexual reproduction and Asexual reproduction Which describes how a bacterium reproduces: ✔✔Binary fission Regarding mitosis and cytokinesis, one difference between higher plants and animals is that in plants: ✔✔A cell plate begins to form at telophase During which of the cell reproduction does the cell divide forming 2 separate identical cells? ✔✔Cytokinesis How does Meiosis differ from Mitosis? ✔✔In Meiosis each of the daughter cells contain half as many chromosomes as the parent. At which phase of meiosis does crossing over occur? ✔✔Prophase 1 A cell division occurs in a human the resulting cell contains 23 chromosomes. This is a description of gametes formed by which phase? ✔✔Meiosis If you wanted to determine the probability of a genotype, what would you use? ✔✔Punnett Square Which describes the appearance of the organism? ✔✔Phenotype What is the probability that a recessive trait would be expressed in offspring if two parents are both heterozygous for the desired trait were crossed? ✔✔25% Because genetics is the study of heredity, many human disorders can be determined by studying a person's chromosomes or by creating what? ✔✔Pedigree Why is DNA important for metabolic activities of the cell? ✔✔It controls the synthesis and enzymes During protein synthesis what process uses a RNA strand to produce a complementary strand of DNA? ✔✔Transcription During the process of transcription, a sequence of RNA is generated in which the RNA base cytosine is inserted complementary to the DNA base Guanine. Which RNA base is inserted complementary to the DNA base Thymine? ✔✔Adenine Why is polarity the most important characteristic of water? ✔✔hydrogen bonding. A high specific heat value. It's versatile solvent properties. Athletes are often concerned with the question of what they need in their diets to increase muscle mass and strength. What biologic molecule would you recommend? ✔✔Proteins Which organelle would you expect to be present in a cell responsible for detoxifying multiple molecules? ✔✔Smooth Endoplasmic Reticulm A cell from the heart muscle would more than likely contain an unusually high proportion of what? ✔✔Mitochondria Which part of cellular respiration produces the greatest amount of ATP? ✔✔Electron transport chain Which is true about the Krebs Cycle and the Calvin Cycle: ✔✔Both result in a net production of ATP and NADH Why is it important for cells to undergo Mitosis? ✔✔Mitosis produces cells for growth and repair of body tissue. 72 chromosomes undergo meiosis. How many chromosomes will be in each gamete? ✔✔36 Which shows how information is transformed to make a protein? ✔✔DNA-RNA Protein [Show More]

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