ACT Science Exam Questions and Answers

ACT Science Exam Questions and Answers Mitochondria - Correct Answer️️ -Organelles that act like a digestive system, which takes in nutrients, breaks them down, and creates energy rich molecules (ATP) for the cell. Lysosomes - Correct Answer️️ -Hold enzymes, digest food and break down the cell when it dies Cell Nucleus - Correct Answer️️ -The brain of the cell. It contains the cell's DNA, or the genetic information from which proteins are made It also helps control eating, movement, and reproduction. Chloroplasts - Correct Answer️️ -Only exist in plant cells and assist in the process of photosynthesis, converting light into energy. Cell Membrane - Correct Answer️️ -Holds all of the pieces of the cell and serves as the barrier between the cell and other cells. DNA - Correct Answer️️ -Acts as the blueprint for protein production. Protein synthesis - Correct Answer️️ -Making proteins. Involves DNA, RNA, ribosomes and proteins. Messenger RNA (mRNA) - Correct Answer️️ -Makes a copy of the sequence of DNA of a specific gene. This process is known as transcription and happens in the nucleus. Once the mRNA is made, it leaves the nucleus and enters the cytosol of the cell. Ribosomes - Correct Answer️️ -Use mRNA as a guide to make protein of the same amino acid sequence as the original DNA. Translation - Correct Answer️️ -The process of producing protein from the mRNA Natural Selection - Correct Answer️️ -In a specific environment, traits that allow organisms to reproduce more effectively will become more common, and traits that reduce reproductive success will become less common. C6H12O6 - Correct Answer️️ -Basic sugar molecule structure. C55H98O6 - Correct Answer️️ -Fats have nearly twice the number of H as C and a very small number of O compared to sugars. Protein - Correct Answer️️ -Composed of amino acid. All contain C, H, O and N (Nitrogen). Water freezing/boing Point - Correct Answer️️ -Water freezes at 0 degrees Celsius and boils at 100 degrees Celsius. pH Scale - Correct Answer️️ -Below 7 is acidic, above 7 is basic, and at 7 is considered neutral. Molar Mass - Correct Answer️️ -The mass of a molecule is the sum of the mass of its atoms. How Charges Interact - Correct Answer️️ -Like charges repel each other, while opposite charges attract each other. Density Formula - Correct Answer️️ -Density = mass/volume Density - Correct Answer️️ -Denser objects sink, and less dense objects float. Absorption - Correct Answer️️ -The process or action by which one absorbs another Atom - Correct Answer️️ -Smallest part of a chemical eleme