Which of these are involved during the direct synthesis of a protein? a. mRNA, small ribosomal subunit, amino acid b. tRNA, large ribosomal subunit c. RNA polymerase, transcription factors d. a and b e. all of these

1. During protein translation, the codon on the mRNA matches to the complementary ____ .

   		codon on the amino acid
   		triplet on the DNA
   		anticodon on the tRNA
   		slot in the ribosome
   		trio on the polypeptide

1. During the electron transport chain, each protein is first ____ and then ____ .

   		reduced; oxidized
   		oxidized; reduced
   		phosphorylated; reduced
   		reduced; phosphorylated
   		oxidized; hydrogenated

Identify one aspect of translation that is present in Bacteria but absent in Eukarya: Group of answer choices :

rRNA in the large subunit of the ribosome plays a catalytic role

The elongation stage is sensitive to the presence of diphtheria toxin

The genetic code consists of 64 unique 3-nucleotide codons

A peptide bond forms between the amino acid of one amino-acylated tRNA and a peptide on the other tRNA

An tRNA carrying methionine is recruited to the ribosome to form the initiation complex

The small subunit rRNA molecule anneals to the Shine-Dalgarno sequence on the mRNA

Genetic Disorder: Argininosuccinic Aciduria

References:

You have joined a research lab that is testing new vaccines for a new strain of the influenza A virus (IAV). The lab's prior studies have shown that when C57BL/6 laboratory mice are given non-pathogenic bacteria that have been engineered to express a 16 amino acid peptide, after about a month the mice produce IgG antibodies that effectively neutralize IAV. Your project is to test serum samples from healthy adult humans who were given these bacteria 6 weeks ago as part of a pilot clinical trial. You find that you can clearly detect IgG antibodies against IAV from about a third of the samples, but cannot detect IAV-specific antibodies from the remainder of the samples. Which of the following is the most likely characteristic shared by individuals who produced a detectable antibody response?

Group of answer choices

They have a genetic polymorphism that causes their T cells to produce comparatively high amounts of IL-2

They express MHC class II allotypes that bind efficiently to the 16 amino acid peptide expressed by the bacteria

They are people who also have pollen allergies

They express a self protein that contains an amino acid sequence identical to the 16 amino acid peptide expressed by the bacteria

They all have genetic polymorphisms in genes for complement proteins that result in inefficient clearance of bacteria by the membrane attack complex (MAC)

5.

a. In a Lineweaver-Burk plot, the y-intercept of the line of best fit is equal to _____ and the x-intercept of the line of best fit is equal to _____:

1) 1/V_max ; –1/K_m                                                                                             4) –1/K_m ; V_max

2) 1/K_m ; 1/V_max                                                                                              5) V_max ; K_m     

3) 1/V_max ; –K_m

b. All of the following statements are true about the relationships between [S], K_m, V_o, and V_max EXCEPT:

1) As [S] increases, V_o gets closer to V_max

2) V_max occurs when the enzyme is saturated with substrate

3) K_m is the [S] at which V_o = V_max/2

4) V_o is closest to V_max when [S] is less than K_m

c. When a protein needs to be degraded by the proteasome, it is covalently attached to another protein called _______. The final enzyme in the process that attaches these two proteins to one another is called _______.

1) Ubiquitin; ubiquitin ligase

2) Ubiquitin-activating enzyme; ubiquitin carrier protein                                     

3) Ubiquitin carrier protein; ubiquitin-activating enzyme                        

4) Proteasome; ubiquitin ligase

5) None of the above

d. If an enzyme has a V_max of 60 nM/sec, what is the V_o if the substrate is present at a concentration equal to 3K_m?

1) 12 nM/sec                                                                                      4) 180 nM/sec

2) 45 nM/sec                                                                                     5) Cannot be determined from information given

3) 60 nM/sec                         

e. The pH at which a protein is usually least soluble is equal to

1) 1                                                      

2) 7                                                     

3) The pH at which the protein charge is most negative

4) The isoelectric point (pI) of the protein

5) pKa of the main chain –COOH group

The chemical process called _____ produces ___ ATP and supplies energy for muscle contraction for _____.

a. Creatine phosphate, 4, 15 seconds

b. Kreb's cycle (aerobic respiration), 36, hours

c. Glycolysis, 2, 30-60 seconds

d. Creatine phosphate, 1, 15 seconds

e. All of the above except A

which of the following are likely to act as lewis acids? BF3, NH4+, NH3, CH3+, CH4, H2O, H3O+

Write the formulas of the conjugate bases of the following Brønsted-Lowry acids.

HCl

(CH_3)_2NH_2+

H_2SO_4

HS-

38.Role of liver in metabolism of fatty acids.

-biochemistry

(please more explanation Im medicine student)

compare the values of the enthalpy of neutralization for the three acids( H3CCOH, Na2S2O3, HCl). explain any similarities and/or differences