Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 23.4, Problem 1R
Summary Introduction
To review:
The way, in which protein function can be studied through the evolution of the gene. Also, give an example of the same.
Introduction:
Gene evolution is the process by which genes of the species change in sequence or size in the long period of time. There are many types of evolution like gene duplication, polyploids, and the structure of genes. The process of phylogenetic tree of species is used to identify the different genes and using them to construct its evolution.
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Life: The Science of Biology
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- Explain Molecular Chaperones.arrow_forwardIn what order does the genetic information flow in living organisms? Choose all that are true. genetic information can be rewritten from protein to DNA genetic information can be translated from RNA to protein genetic information can be rewritten from DNA to RNA genetic information can be rewritten from protein to RNA genetic information can be rewritten from RNA to DNAarrow_forwardBased on our modern understanding, what revisions are necessary to the original one-gene / one-enzyme hypothesis? (Check all that apply.) Alternative splicing allows one gene to encode multiple polypeptides. Some genes encode RNAs, not enzymes. Some genes encode lipids, not enzymes. Some genes encode polypeptides that are not enzymes, such as structural proteins. Proteins as functional units may be composed of several polypeptides, so genes may encode just one polypeptide within a larger protein. Enzymes are not encoded by genes after all — they are constructed through separate biochemical processes.arrow_forward
- When comparing evolutionary similarities between different genes within a gene family, it is usually more straightforward to compare genes by using the protein sequences of gene products rather than DNA sequences of the genes themselves. Explain why this is the case. (Write 5 points)arrow_forwardWhat is a gene? What is a genome? How many base pairs are there in the human genome?arrow_forwardWhy Genetic Studies Rely on the Use of Model Organisms ?arrow_forward
- Genome is a word used to refer to??arrow_forwardModel organisms are those widely used by researchers who wish to understand basic processes that are common to many species. Bacteria such as Escherichia coli are model organisms for modern geneticists. Give three reasons why bacteria would be useful in genetic experiments.arrow_forwardMany aspects of gene function can be nicely explained with the one-gene-one-enzyme hypothesis, which states that a gene controls the production of an enzyme. Which of the following findings about gene expression, though, requires an expansion of this simple concept? Choose an answer below: Non-enzyme proteins are made from genes too. Some genes code for RNA molecules only. Enzymes composed of different polypeptides are coded for by more than one gene. a and c, but not b a, b, and carrow_forward
- What exactly is a genome?arrow_forwarda) Explain the difference between a genome and a transcriptome. Do all cells in an organism have the same genomes and or transcriptomes? b) Explain a method you could use to compare transcriptomes, and what you can learn from comparing transcriptomes.arrow_forwardMany aspects of gene function can be nicely explained with the one- gene-one-enzyme hypothesis, which states that a gene controls the production of an enzyme. Which of the following findings about gene expression, though, requires an expansion of this simple concept? Non-enzyme proteins are made from genes too. Some genes code for RNA molecules only. Enzymes composed of different polypeptides are coded for by more than one gene. a and c, but not b a, b, and carrow_forward
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