Student Exploration Rna And Protein Synthesis Answer Key Pdf

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student exploration rna and protein synthesis answer key pdf

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This worksheet is focused on the coding of mRNA as it is transcribed from one of the two strands that make up double-stranded DNA, and then the decoding of the mRNA into a specific sequence of amino acids in a protein. Instructions 1. It is recommended that you assign only one possibly two for students to decode.

Student Exploration: RNA and Protein Synthesis

Students are not expected to know the answers to the Prior Knowledge Questions. Suppose you want to design and build a house. How would you communicate your design plans with the construction crew that would work on the house? Answers will vary. Sample answer: I would draw plans for the house and make copies of the plans for the crew. Cells build large, complicated molecules, such as proteins. What do you think cells use as their design plans for proteins?

Gizmo Warm-up Just as a construction crew uses blueprints to build a house, a cell uses DNA as plans for building proteins. RNA is composed of adenine, cytosine, guanine, and uracil U. How do you know? It is DNA. It contains thymine instead of uracil. RNA polymerase is a type of enzyme. Enzymes help chemical reactions occur quickly.

Click the Release enzyme button, and describe what happens. The two strands of the DNA molecule are separated. Introduction: The first stage of building a protein involves a process known as transcription. Question: What occurs during transcription?

Experiment to find which RNA nucleotide on the right side of the Gizmo will successfully pair with the thymine at the top of the template strand of DNA. Which RNA base bonded with the thymine? Experiment: The next three bases on the DNA template strand are adenine, cytosine, and guanine. Use the Gizmo to answer the following questions: A.

Which RNA base bonds with adenine? Uracil B. Which RNA base bonds with cytosine? Guanine C. Which RNA base bonds with guanine? What is the nucleotide sequence of the mRNA strand you built? Any change would be reflected in the mRNA molecule. Introduction: After a strand of mRNA has been built, the strand exits the cells nucleus. The second stage of protein synthesis, called translation, occurs next. During translation, the strand of mRNA is used to build a chain of amino acids.

Question: What occurs during translation? Every group of three bases of mRNA is called a codon. In the table at right, list the nitrogen bases in each codon. Hint: Start from the top of the strand and read down. The first mRNA codon is called the universal start codon. Each tRNA molecule carries only one kind of amino acid. This amino acid is determined by the tRNAs anticodon, a set of three unpaired bases. Which anticodon do you think would attach to the mRNAs start codon?

UAC Use the Gizmo to check your answer. Observe: Place the next two anticodons on the mRNA strand. What happens? Molecules called release factors bind to stop codons. Place the release factor on the mRNA molecule. Click Continue. Your protein is now complete. Most actual proteins consist of sequences of hundreds of amino acids. Activity B continued on next page.

Activity B continued from previous page 5. Infer: Why do you think stop and start codon signals are necessary for protein synthesis? Without start and stop codon signals, there would be no way to begin or end the process of translation.

Summarize: Describe the processes of transcription and translation in your own words, based on what you have observed in the Gizmo. The tRNA molecule is also attached to an amino acid. The two amino acids form a bond. Introduction: Inside a ribosome, amino acids are linked together to form a protein molecule.

As the chain of amino acids grows, it tends to coil and form a three-dimensional shape. The complex shape that results determines the properties of the protein. Proteins have a wide variety of structures and perform many essential functions in living things. A sequence of DNA that codes for a specific protein is called a gene.

By coding for proteins, genes determine an organisms inherited traits. Question: How do genes code for specific proteins and traits? Translate: Each codon codes for one of 20 amino acids.

This code is universal among all living things. For example, the mRNA codon GGU codes for the amino acid glycine in every living thing, from a bacteria to an elephant. Examine the codon chart below. The amino acid coded for by a specific mRNA codon can be determined by finding the first base of the codon along the left side of the table, the second base along the top of the table, and the third base along the right side of the table.

Extension continued from previous page 2. Apply: Suppose you wanted a protein that consists of the amino acid sequence methionine, asparagine, valine, and histidine.

Give an mRNA sequence that would code for this protein. Summarize: How do genes determine the traits of an organism? Explain in detail. Sample answer: A gene is made up of a series of nucleotides on a DNA strand. The sequence of amino acids determines the shape and function of the protein molecule.

The shape and function of protein molecules determine the traits of organisms. Extend your thinking: Sometimes errors occur during transcription or translation. Examine the codon chart on the previous page.

Notice that each amino acid is coded for by several different codons. How might this offset transcription or translation errors? Slight changes to a codon for example, UUU changing to UUC would result in no change to the amino acid coded for, and thus no change to the protein. This decreases the chance that a transcription or translation error will cause a faulty protein to form. Think and discuss: Consider the two following statements: The theory of evolution states that all living things had a single common ancestor.

The translation between mRNA and amino acids is the same for all living things. Does the second statement support the theory of evolution? Explain why or why not. If possible, discuss your answer with your teacher and classmates.

Sample answer: If different groups of living things were not related to one another, it would be likely that transcription would work differently as well. The fact that transcription is the same for all living things is strong evidence that all living things are related and may have descended from a single ancestor.

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RNAProteinSynthesisSE KEY

By Cowen Physics www. A gene is a biological unit of genetic information which is located in a definite position or locus on a filamentous or rod-shaped chromosome contained in the nucleus. As an organism grows or repairs damaged tissue, new cells are being produced by mitosis. Quizlet gravity game cheat - The correct answer pops up in the browser console and the restart button down left. Decay by decomposing fungi, bacteria, and worms Carbon Sink coal, oil, peat, natural gas Half-life — is the time required for half the atoms of a radioactive nuclide to decay. Each radioactive nuclide has its own half-life.

Cell Structure. Osmosis is the movement of water molecules from an area of 2. Part B - Short Answers 1. Chapter 1 from. Selectively permeable membrane into cells b Amount of a substance in a certain place c Moves water into and out of cells d Allows some substances through. The Parent Guide resources are arranged by chapter and topic.

Production of High-Affinity Primary, Secondary, Conjugated, and/or Custom Antibodies.

Homeostasis gizmo answers quizlet

Students are not expected to know the answers to the Prior Knowledge Questions. Suppose you want to design and build a house. How would you communicate your design plans with the construction crew that would work on the house? Answers will vary.

RNA and protein synthesis review

They develop the academic mindsets and metacognitive skills necessary for long-term learning.

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Gene: The unit of heredity. This is an interactive page about DNA. You can spin a molecule of DNA, identify its components, and make it replicate. You'll need to have the Chime plug-in, which is available via a link from the site. It includes video of an interview with James Watson. Leading strand: continuous strand.

Modeling Cell Structures Worksheet Answers

Gizmos Answers Sheets.

 Итак, вы хотите продать ключ, имеющийся в вашем распоряжении. Интересно. А что по этому поводу думает Энсей Танкадо. - Я ничем не обязан мистеру Танкадо.

Сьюзан была согласна с этим, но в то же время прекрасно понимала: Фонд электронных границ никогда не узнает, насколько важен и нужен ТРАНСТЕКСТ. Эта машина помогла предотвратить десятки преступлений, но связанная с ней информация строго засекречена и никогда не будет раскрыта. Причина такой секретности проста: правительство не может допустить массовой истерии. Никто не знает, как поведет себя общество, узнав, что группы фундаменталистов дважды за прошлый год угрожали ядерным объектам, расположенным на территории США. Ядерное нападение было, однако, не единственной угрозой.

 - Что скажешь. А потом мы могли бы… - Выкинь это из головы. - Сколько в тебе снобизма.

Воздух, ворвавшийся в ТРАНСТЕКСТ, воспламенился. В ослепительной вспышке света коммандер Тревор Стратмор из человека превратился сначала в едва различимый силуэт, а затем в легенду. Взрывной волной Сьюзан внесло в кабинет Стратмора, и последним, что ей запомнилось, был обжигающий жар.

 Ты же всегда стремился к большей ответственности.

Сьюзан была озадачена. - Это по-латыни, - объяснил Хейл.  - Из сатир Ювенала. Это значит - Кто будет охранять охранников?. - Не понимаю.

Теперь, подумала Сьюзан, все встало на свои места. Танкадо хотел, чтобы Стратмор отследил и прочитал его электронную почту. Он создал для себя воображаемый страховой полис, не доверив свой ключ ни единой душе.


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