A2 HESI Biology Practice Test

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 chloroplast 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