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At pH 2, most proteins lose biological activity. Why? (select one or more)
a. the distribution of salt bridges changes
b. denaturation occurs due to unfolding of the polypeptide chain
c. the side chains are protonated and the charge of the protein changes
d. decompose
The enzyme fumarase catalyzes the reversible hydration of fumarate to L-malate, but not the hydration of maleic acid (cis-isomer) of fumarate. This is an example of (select one)
a. chiral activity
b. stereoisomerism
c. biological activity
d. stereospecificity
e. racemization
Cite at least 2 specialized roots and leaves then identify it's economic importance to humans.
a hollow cylindrical column is to carry a load of 20 kn where the outside diameter of the column is 100 mm. the length of the column is 5m. if the length of the column is mild steel (sy=250 mpa,e=200 gpa) determine the minimum thickness required for the column. use factor of safety of 2. considered eccentricity e=0.2m
Which of the following compounds is not a cofactor of pyruvate dehydrogenase and α-ketoglutarate dehydrogenase? (select one)
a. NAD
b. lipoate
c. FAD
d. ATP
e. CoASH
Which of the following statements about the accuracy of protein biosynthesis is NOT true (select one)
a. aminoacyl tRNA synthetases hydrolyze misloaded mRNAs
b. Riobosomes contain exopeptidase activity that performs a corrective function
c. the error rate in protein biosynthesis is approximately 1 / 10,000
d. the codon-anticodon interaction ensures the entry of the correct mRNA into the A-site
e. the binding of mRNA to αα-mRNA synthetases is very specific
A reversible inhibitor that can bind both free enzyme (E) and enzyme-substrate complex (ES) is referred to as: (select one)
a. catalytic
b. uncompetitive
c. suicidal
d. uncompetitive
e. competitive
Which of the following compounds are not cholesterol derivatives? (select one or more)
a. ketone bodies
b. vitamin D
c. prostaglandins
d. progesterone
Write short HTML 5 codes to do the following:1 Headings - h1 to h6
2 Text formatting
3 Preformatted text (Preserve line breaks and spaces)
4 Sub and Superscript text
5 Insert contact information
6 Inserting horizontal lines
7 Create hyperlink
8 Creating a mailto link - A link that sends an e-mail
10
9 Setting width and height of the images11 Aligning images12 Making a simple table - The most basic form of a table13 Setting the dimension of a table14 Specify the table caption15 Tables with borders - Adding the default table borders16 Creating an unordered list17 Creating an ordered list18 Creating text input fields19 Creating password input fields20 Creating HTML5 new input fields21 Checkboxes and radio buttons22 Select boxes - A drop-down list23 Select box with a pre-selected value24 Grouping of options inside a select box25 Enable multiple selection inside a select box26 Textarea - A multi-line text input field27 Creating butto
State the mathematical model that can be used to compute for the paralytic angle hence solve for the paralytic angle
