BIOLOGY 109 EXAM 1 QUESTIONS AND CORRECT ANSWERS UPDATED 2025 VERIFIED BY EXPERTS What are the characteristics of life? - correct answer All life is organized All life grows and develops All life reproduces All life responds to stimuli All life proce

BIOLOGY 109 EXAM 1 QUESTIONS AND CORRECT ANSWERS UPDATED 2025 VERIFIED BY EXPERTS What are the characteristics of life? - correct answer All life is organized All life grows and develops All life reproduces All life responds to stimuli All life processes energy All life adapts All life is homeostatic List the steps to the scientific method. - correct answer make an observation, Come up with a question, form a hypothesis, collect and analyse data, conclusion. What is atomic mass? - correct answer number of protons and number of neutrons What is the atomic number? - correct answer the number of protons and electrons What is an ion? - correct answer an element or compound with an electrical charge What are the types of ions? What is their charge? - correct answer Cation: positive ion resulting from the loss of electrons Anion: negative ion resulting from a gaining of electrons What is an isotope? - correct answer an element with a charge in the number of neutrons What are the types of chemical bonds? - correct answer Ionic Bond: the bonding of opposite ions. Covalent Bond: a bond resulting from the sharing of electrons. Hydrogen Bond: the bonding of hydrogen to another element. List the types of particles and their charge. - correct answer Protons: (+) charge; 1 amu Electrons: (-) charge; 0 amu Neutrons: zero charge; 1 amu List the properties of water. - correct answer Water is sticky, Universal solvent, Ice is less dense than liquid water, Water can filter UV radiation, Water remains a liquid over a wide temperature range, Moderate pH. List the difference between cohesion and adhesion. - correct answer Cohesion: water molecules bonding to each other Adhesion: water molecules bonding to other polar molecules The difference in pH units between 2 acidic solutions is 3. How much more acidic is the stronger acid than the weaker acid? - correct answer 1000 more acidic The 2+ in Cu2+ tells us that this atom is what? - correct answer has two more protons than electrons An atom of carbon has an atomic number of 6 and an atomic weight of 12. How many neutrons are in a typical carbon atom? - correct answer 12 - 6 = 6 neutrons In chemical bonding, when bonded atoms share electrons is called? - correct answer Covalent bond How are charges distributed on water molecules? - correct answer the oxygen end is negative relative to the end with 2 hydrogen atoms. Water strides are common insects that can skip across the surface of ponds and streams. This lifestyle is possible by water's what? - correct answer cohesion and resulting surface tension What are the 3 domains of Life? - correct answer Bacteria, Archie, Eukarya. Which is not a characteristic of life? - correct answer all living things eat other organisms to gain energy Skin s sometimes referred as the largest organ of the body. Why is skin considered to be an organ and nit a tissue or some other structure? - correct answer Skin consists of multiple tissue types that cooperate to perform a specific task. Carbon has the atomic number 6 and an atomic weight of 12. How many protons are in a typical carbon atom? - correct answer P: 6 (answer = subtract neutrons and electrons) E: 6 N: 12 List the types of classifications in order. - correct answer Domain Kingdom Phylum Class Order Family Genus Species What are the organic molecules(chemicals of life)? - correct answer Carbohydrates Proteins Lipids Nucleic Acids What are carbohydrates also known as? What are they used for? - correct answer Sugars or Saccharides Used for quick energy List some of the simple Carbohydrates. - correct answer Monosaccharides Disaccharides Polysaccharides What are proteins? What is considered their sugars and how many is there in total? - correct answer Structural Molecules 20 Amino Acids List the types of structures proteins contain. - correct answer Primary Structure Secondary Structure Tertiary Structure Quaternary Structure What is the primary structure of a protein? - correct answer linear order of amino acids What is the secondary structure of a protein? - correct answer primary structure folded up What is the tertiary structure of a protein? - correct answer secondary structure folded up What is the quaternary structure of a protein? - correct answer multiple tertiary structures bonded together What are considered lipids? - correct answer Fats Wakes Oils What is the function of lipids? What are some lipids referred to as? - correct answer Long term energy storage and structures Hydrocarbons What is the meaning of Hydrophobic? - correct answer non reacting with water What is the difference between saturated and unsaturated? - correct answer Saturated: solids at room temperature