NAS 2 Challenge Exam (2023/2024 Update) | 100% Correct Questions and Answers (Verified Answers)

NAS 2 Challenge Exam (2023/2024 Update) | 100% Correct Questions and Answers (Verified Answers) QUESTION describe protein three-dimensional structure and its role in protein function Answer: tertiary, functional protein, either globular or rod like. Fibrous or globular to provide structure QUESTION Identify specific types of organic compounds and their functions Answer: -Nucleic acids: information molecule, molecule of heredity, director of metabolism involved in protein synthesis, immediate source of energy for cellular work -Lipids: components of membranes, long term energy storage, insolation -Carbohydrates: short term energy source, transport form in animal, long term energy storage -Proteins: organic catalyst, digestive enzymes, structural protein in hair, structural protein in skin QUESTION list all the components of the cell theory Answer: -All living organisms are composed of cells. They may be unicellular or multicellular -the cell is the basic unit of life -cells arise from pre-existing cells QUESTION identify cell organelles and their functions Answer: -a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body -nuclei: stores genetic information -Mitochondria: produce chemical energy -Ribosomes: assemble proteins QUESTION what are the three main parts of the cell cycle Answer: interphase, mitosis, and cytokinesis QUESTION Interphase Answer: 1. G1 )growth 1): The cell grows to accommodate new genetic information 2. S (synthesis): the cell dupplicates its DNA for the two daughter cells 3. G2 (growth 2): the cell grows once again for there to be enough QUESTION Mitosis Answer: 1. Prophase: chromatin is organized into chromosomes, two centrosomes move to the poles of the cells, and the nuclear envelope breaks down 2. Prometaphase: the nuclear envelope is gone, the spindle fibers start to form, and the chromosomes start to move towards the equator of the cell 3. Metaphase: the chromosomes align in the middle of the cell 4. Anaphase: the chromosomes are split apart into chromatids by the spindle fibers and are starting to be pulled to opposite poles