Indicate whether each of the following statements about triglycerides is true or false. Indicate whether each of the following statements about triglycerides is true or false. 1. A triacylglycerol is composed of 3 glycerol molecules joined to a fatty acid. 2. The hydrocarbon chains of fatty acids vary in length as well as in the number and location of double bonds between the carbon atoms. 3. Fatty acids with one double bond in their hydrocarbon chain are called monounsaturated‚ while those with
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sequence of their ribosomal RNA subunits. In addition‚ recent studies have shown that archaebacterial RNA polymerases resemble the eukaryotic enzymes‚ not the eubacterial RNA polymerase. Archaebacteria also have introns in some genes‚ an advanced eukaryotic characteristic that was previously unknown among prokaryotes. In eukaryotic cells‚ the initial messenger RNA (M-RNA) transcribed from the DNA (gene) is modified (shortened) before it leaves the nucleus. Sections of the M-RNA strand called introns
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walls. Their cells instead are found to have pseudopeptidoglycan. ("What Are the Differences‚" n.d.). The cell membranes of archaea reveal more differences as they are unique and have different Ribosomal RNAs. Archaea have three RNA polymerases more similar to eukaryotes‚ whereas‚ bacteria only have one RNA polymerase. Bacteria and archaea both have lipids but the lipids in bacteria contain fatty acids with
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Name and describe the three main parts of a cell. plasma membrane-forms a cell’s flexible outer surface‚ separating the cell’s internal environment (inside the cell) from its external environment (outside the cell) cytoplasm- consists of all the cellular contents between the plasma membrane and the nucleus. nucleus- is the largest organelle of a cell. The nucleus acts as the control center for a cell because it contains the genes‚ which control cellular structure and most cellular activities
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and unmanned craft was sent to the deepest part of the ocean‚ the Marianas Trench‚ where it took a sediment sample and brought it back for analysis. From this sediment sample they extracted several bits of DNA which coded for prokaryotic ribosomal RNA. This RNA held genes that coded for pressure regulation within the cell. This prevents the bacteria from bursting and dying. This DNA was identified to be very closely related to the genus Pseudomonas‚ one of the most wide spread genera in the world
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material that determines the structure and function of the cell it’s controlling. Nucleolus; the nucleolus is in the nucleus where rRNA genes exist and are transcribed. The resulting rRNAs and ribosomal proteins are combined to form the ribosomal subunits. The function of the nucleolus is the production of ribosomal subunits. Chromosomes; the chromosomes main function is to control the activities of a living cell. They are vital for the cell division process and are responsible for the division‚ replication
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a phospholipid bilayer that regulates cell activity‚ the DNA is wrapped tightly around proteins and packaged into compacts units called chromosomes. The DNA is double stranded. Also inside the nucleus is the nucleolus that is made of protein and ribosomal DNA (rDNA) sequences of chromosomes. Plant cells also have a cytoskeleton‚ an internal protein scaffold that supports the cell. The cytoskeleton is composed of microtubules and microfilaments. Microfilaments are solid rods made of globular proteins
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BIO 225 – Exam 2 Review Sheet Chapter 9 1. Know the anatomy of the structures that make up the prokaryotic cell. Know their functions. Know any clinical significance each structure might have and if it is a target for antibiotics. (On separate sheet) 2. Know the differences between Gram positive and Gram negative cell walls. * Gram positive cell wall * In addition to many layers of peptidoglycan‚ the cell wall of Gram-positive bacterials cells also contain: * Teichoic
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Unit 2 Lecture Study Guide 1) What are the parts of an atom? Where are the subatomic particles found? Parts of an atom- divided into two basic regions: 1. the central nucleus (contains heavy particles) 2. the electron cloud (contains very light‚ moving particles) Subatomic particles: 1.Protons (found in the central nucleus) 2.neutrons (found in the central nucleus) 3.electrons (spin rapidly in a cloud around the central nucleus) 2) How does the Atomic Mass # differ from the Atomic
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the protein synthesis site in the cytoplasm. A) Transfer RNA Answer: B B) Ribosomal RNA Diff: 1 Page Ref: 105 C) Synthetase enzymes 16) Act as "interpreter" molecules that recognize specific amino acids and nucleotide base sequences. D) ATP Answer: A E) Messenger RNA Diff: 1 Page Ref: 105 17) Attaches the correct amino acid to its transfer RNA. Answer: C Diff: 1 Page
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