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RNA

exam2 soln

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Solutions to Molecular Biology Unit Exam Question 1 Consider the following origin of replication that is found on a chromosome. The sequence of region 1 is shown below. Region 1: 5??CTGACTGACA?3? 3??GACTGACTGT?5? 5? 3? 5? 3? Region 1 ori top ? bottom ? a) Within Region 1, which strand will be the template for leading strand synthesis, the top or the bottom? The bottom strand will be the template for leading strand synthesis. b) If we assume that a lagging strand fragment is made from region 1, what will be its sequence? 5? T G T C A G T C A G 3? c) You examine DNA replication in an E. coli mutant, which has a partially defective DNA polymerase. In vitro

Campbell AP Bio Chapter 17

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LECTURE PRESENTATIONS For CAMPBELL BIOLOGY, NINTH EDITION Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson ? 2011 Pearson Education, Inc. Lectures by Erin Barley Kathleen Fitzpatrick From Gene to Protein Chapter 17 Overview: The Flow of Genetic Information ? The information content of DNA is in the form of specific sequences of nucleotides ? The DNA inherited by an organism leads to specific traits by dictating the synthesis of proteins ? Proteins are the links between genotype and phenotype ? Gene expression, the process by which DNA directs protein synthesis, includes two stages: transcription and translation ? 2011 Pearson Education, Inc. Concept 17.1: Genes specify proteins via

Chapter 25 The History of Life on Earth

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cell
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Environment

Chapter 25- Origin of life on earth The earth is estimated to have formed about 4.6 years ago condensing from a cloud of dust and rock. For the first few hundred millions years the Earth was being bombarded by huge chunks of rock and ice. The collisions created enough eat to vaporise the adavible water and prevent seas from forming. The early earth had a reducing atmosphere (electron adding) and there was no oxygen in the atmosphere, and as a result there was no need for an ozone layer to protect the earth from high levels of UV radiation.

AP Bio Reading Guide Answers CH 16

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DNA Replication
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DNA
Okazaki fragments
Molecular Structure of Nucleic Acids: A Structure for Deoxyribose Nucleic Acid
Gene
Primer
Semiconservative replication
RNA
Replication fork
Nucleic acid double helix

Copyright ? 2011 Pearson Education, Inc. - 1 - Name_______________________ Period___________ Chapter 16: The Molecular Basis of Inheritance Concept 16.1 DNA is the genetic material 1. What are the two chemical components of chromosomes? DNA and protein 2. Why did researchers originally think that protein was the genetic material? Until the 1940s, the case for proteins seemed stronger, especially since biochemists had identified them as a class of macromolecules with great heterogeneity and specificity of function, essential requirements for the hereditary material. Moreover, little was known about nucleic acids, whose physical and chemical properties seemed far too uniform to account for

TEST BANK

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Sense
Messenger RNA
Gene

Biology, 7e (Campbell) Chapter 17: From Gene to Protein 7) Which of the following represents a similarity between RNA and DNA? D) nucleotides consisting of a phosphate, sugar, and nitrogenous base 9) Using RNA as a template for protein synthesis instead of translating proteins directly from the DNA is advantageous for the cell because B) RNA acts as an expendable copy of the genetic material, allowing the DNA to serve as a permanent, pristine repository of the genetic material. C) many mRNA molecules can be transcribed from a single gene, increasing the potential rate of gene expression. D) B and C only

Protein Synthesis

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Messenger RNA
Transfer RNA
Ribosome
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health

Protein Synthesis What are proteins? An organic molecule Building block is amino acids Examples: Enzymes Antibodies Hemoglobin Part of Cell Membrane Structural (Collagen) How Are Proteins Made? The instructions for building a protein are found on a gene (DNA). RNA copies the DNA code to make a protein. Step 1 of Protein Synthesis The 1st step is called TRANSCRIPTION Transcription (Transcribe) how would we define? Transcription The information in DNA must be written into mRNA code DNA strand mRNA Who is involved in Transcription? DNA and mRNA mRNA goes to the nucleus to copy DNA and takes the codons to the ribosome Step 2 of Protein Synthesis The 2nd step is called TRANSLATION Translation (Translate) how would we define? Translation

Freshman Biology

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THE BIG PICTURE DNA RNA PROTEIN Replication Transcription Translation Nucleotide Structure SUGAR Ribose in RNA Deoxyribose in DNA PHOSPHATE BASE Function of DNA Replication Produce 2 DNA molecules identical to the parent molecule Each will be distributed to 2 new cells during mitosis & 4 gametes during meiosis Two things can happen to DNA: Replication - so that the cell can divide Transcription ? so that the code for making a protein can be sent into the cell TRANSCRIPTION Function Produce a temporary RNA copy complimentary to part of 1 DNA strand mRNA will be used to take DNA code to ribosome & make protein Transcription animation http://www.stolaf.edu/people/giannini/flashanimat/molgenetics/transcription.swf Steps (in Nucleus)

AP Biology chapter 4 and 5 test

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Chemistry
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Biomolecule
RNA
Protein
Amino acid
Nucleic acid sequence
Uracil
Hydrolysis
Nucleic acid
Gene
health
macromolecules
Carbon Cycle

A.P. Biology: Chapter 4 & 5 Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. At which level of protein structure are interactions between the side chains (R groups) most important? a. primary d. quaternary b. secondary e. all of the above c. tertiary 2. All of the following nitrogenous bases are found in DNA except a. thymine. b. adenine. c. uracil. d. guanine. e. cytosine. 3. Which of the following best summarizes the relationship between dehydration reactions and hydrolysis? a. Dehydration reactions assemble polymers, and hydrolysis breaks down polymers. b. Hydrolysis only occurs in the urinary system, and dehydration reactions only occur in the digestive tract. c.

protein synthesis

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RNA
Translation
Messenger RNA
Transfer RNA
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health

14.1 Structure of ribonucleic acid The genetic code Sequence of nucleotides in DNA forms a code that determines the sequence of amino acids in the proteins. In eukaryotes the DNA code is largely confined to the nucleus. The synthesis of proteins takes place in the cytoplasm. Sections of the DNA code are transcribed onto a single-stranded molecule called ribonucleic acid RNA. There are a number of types of RNA. The one that transfers the DNA code from the nucleus to the cytoplasm acts as a type of messenger and is called messenger RNA (mRNA). This mRNA is small enough to leave the nucleus through the nuclear pores and to enter the cytoplasm, where the code that it contains is used to determine the sequence of amino acids in the proteins which are synthesised there.

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