North Carolina State University

BIO 181 Chapter 5the fluid mosaic model - correct answer states that the membrane is a mosaic of protein molecules bobbing in a fluid bilayer of phospholipids integral proteins - correct answer penetrate the hydrophobic interior of the bilayer peripheral proteins - correct answer are loosely bound to the surface of the membrane carbohydrates on the external side of the plasma membrane - correct answer vary among species, individuals, and even cell types in an individual carbohydrates...

bio 181 chapter 10-11Chloroplast Structure - correct answer contains a plant cell's thylakoids, stroma and grana, and chlorophyll Chloroplast Function - correct answer Site of photosynthesis Photosynthetic Pigments - correct answer absorb light energy and use it to carry out photosynthesis; chlorophyll a absorbs red and blue best and chlorophyll b funnels the energy to chlorophyll a Photosystem 1 - correct answer a light reaction in which ATP and NADPH are formed (comes 2nd) Autotro...

bio 181 chapter 11 GCUquorum sensing - correct answer a concentration of signaling molecules allows bacteria to sense local population density in this process signaling molecules - correct answer cells in a multicellular organism communicate via local signaling - correct answer animal cells may communicate by direct contact; paracrine cell junctions - correct answer in plant and animal cells that directly connect the cytoplasm of adjacent cells paracrine signaling - correct answer se...

Bio 181 Chapter 13Sex Chromosomes - correct answer X (large) and Y (small) -only the ends of the Y chromosome have regions that are homologous with corresponding regions of x chromosomes SRY Gene - correct answer required for development of testes -sex determining region y protein Ovum - correct answer contains an x Sperm - correct answer can contain an x or y Sex-Linked Gene - correct answer gene located on either sex chromosome -50 to 60 Y-linked genes (found on Y chromosomes) ...

Bio 181 Chapter 14"blending" hypothesis - correct answer The idea that genetic material from the two parents blends together (like blue and yellow paint blend to make green) "particulate" hypothesis - correct answer the idea that parents pass on discrete heritable units (genes) character - correct answer A heritable feature that varies among individuals (such as flower color) trait - correct answer Each variant for a character, such as purple or white color for flowers true-bre...

Bio 181 chapter 17products of gene expression - correct answer DNA to mRNA to polypeptide to protein Transcription - correct answer DNA to mRNA Translation - correct answer mRNA to polypeptide to protein At the ribosome - correct answer Where does translation occur? primary transcript - correct answer The initial mRNA can be further processed products of gene expression - correct answer One gene = one polypeptide Code - correct answer DNA is the ? Disposable - correct answer...

Bio 181 Exam #4Suppose you are provided with an actively dividing culture of E. Coli bacteria to which radioactive thymine has been added. What would happen if a cell replicates once in the presence of this radioactive base? A. One of the daughter cells, but not the other, would have radioactive DNA B. Neither of the two daughter cells would be radioactive C. All four bases of the DNA would be radioactive D. Radioactive Thymine would pair with nonradioactive guanine E. DNA in both daughter ...

Bio 181 Exam 1 (Ch 1-7)What are the shared properties of living organisms? A. Uses oxygen for respiration B. Sexual reproduction C. Able to move D. Adapted to its environment E. Multicellular - correct answer D. Adapted to its environment Reasoning: not multicelluar because prokaryotic cells are not multicelllular What is an amphipathetic molecule? A. A molecule that amplifies the effects of an enzyme B. A molecule that is toxic to amphibians C. A molecule that has hydrophilic and...

BIO 181 Exam 1 (Final Review)Which of the following biological organizations of hierarchical ordered complexity of life is in the correct order? - correct answer Cells, organisms, communities, biosphere. In 2006, eight grizzly bears were found to have DNA traced to one female polar bear. These bears were called, "grolar bears." This is an example of... - correct answer Gene Flow A mule is a hybrid of a donkey and a horse. Mules are sterile and cannot produce offspring, so the only way to...

bio 181 exam 1 (kosal)Compare and contrast the different mechanisms of speciation (allopatric, sympatric, parapatric, peripatric). - correct answer -Allopatric speciation takes place when populations are geographically isolated. Volcano explodes and populations are divided. -Sympatric occurs without geographic isolation. Occurs through the process of polyploidy: producing individuals with more than two sets of chromosomes. It is a genetic change within a population. -Parapatric speciation ...