Biology, 09.12.2019 18:31 dayanara72
Your body contains tens of thousands of different proteins, each with a specific structure and function. the unique three-dimensional shape of each of these diverse proteins is based on several superimposed levels of structure. which of the following statements is/are accurate descriptions of proteins? select all that are correct. a. the primary structure of a protein is the order of amino acids in a polypeptide, as coded for in the dna of a gene. b. the 20 amino acids found in proteins differ in the composition of their r groups. c. secondary structures, which include the alpha helix or beta pleated sheet, are held together by ionic bonds between r groups. d. tertiary structure is the overall shape of a polypeptide, which may be stabilized by hydrophobic interactions and ionic bonds. e. quaternary structure is only found in proteins that have more than one polypeptide subunit
Answers: 2
Biology, 21.06.2019 13:30
Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements
Answers: 1
Biology, 22.06.2019 10:30
Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.
Answers: 3
Biology, 22.06.2019 17:30
Sally, age 3 months, has a moist, red, vesicular rash on her cheeks, the backs of her hands, and her arms. her mother said sally was constantly trying to scratch the rash and often has difficulty sleeping. her father has a family history of allergic rhinitis and asthma. discussion questions. 1. review atrophic dermatitis from chapter 3 and discuss the pathophysiology of sally’s symptoms. 2. why is the father’s medical history significant, and what can sally expect as she grows up? 3. discuss the need to limit scratching, and describe practical methods to achieve this.
Answers: 3
Your body contains tens of thousands of different proteins, each with a specific structure and funct...
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