A2 HESI Biology Practice Test

In the hierarchic system of classification, which of the following is the least inclusive? - Species After observing an event, you develop an explanation. This statement is referred to as which of the following? - Hypothesis A molecule of water is bonded with another molecule of water by what type of bond? - Hydrogen Which of the following is a benefit of the intermolecular hydrogen bonding of water? (Select all that apply.) - Water has a relatively high specific heat value. Water has strong cohesive and adhesive properties. Polarity of water allows it to act as a versatile solvent. Of all the molecules that are significant to biology, which of the following are considered most important? - Carbohydrates, lipids, proteins, and nucleic acids Lipids are better known as fats, but what are they specifically? (Select all that apply.) - Fatty acids Phospholipids Steroids What are the two categories of fatty acids? - Saturated fats and unsaturated fats How do phospholipids function in cells? - They are integral components of the plasma membrane. Which of the biological molecules are considered the most significant contributor to cellular function? - Proteins Proteins are polymers of which of the following? - 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? - Ribosome Which of the following are distinct organelles that produce cell energy? - Mitochondrion and chloroplast Which component of the cell contributes to the protection, communication, and the passage of substances into and out of the cell? - Nucleus The cell membrane consists of a bilayer of phospholipds with proteins, cholesterol, and glycoproteins. This bilayer creates a hydrophobic region between two layers of lipids, making it which of the following? - Selectively permeable What is the first step in the conversion of glucose to pyruvate? - Glycolysis