Discussion
Home ‣ Biochemistry ‣ Disease Associated with Immune System See What Others Are Saying!
- Question
X-linked hyper IgM syndrome, resulting in high levels of serum IgM and low levels of serum IgG, is caused by a defect in CD40L expression. The specific immune event that would be prevented by a defective CD40L would be
Options- A. activation of B cells by T-independent antigens
- B. failure of B cells to provide co-stimulation for Th2 activation
- C. failure of Th2 cells to provide co-stimulation for B cell isotype switching
- D. failure of Th2 cells to provide co-stimulation for B cell proliferation
- Correct Answer
- failure of Th2 cells to provide co-stimulation for B cell isotype switching
- 1. The lac operon is translated into __________ proteins.
Options- A. 1
- B. 2
- C. 3
- D. 4 Discuss
- 2. AUG codes for methionine act as a
Options- A. initiation code
- B. elongation code
- C. termination code
- D. propagation code Discuss
- 3. The enzyme that joins DNA cuts is called
Options- A. joinase
- B. ligase
- C. DNA phosphorylase
- D. reverse transcriptase Discuss
- 4. ATP is from which general category of molecules?
Options- A. Polysaccharides
- B. Proteins
- C. Nucleotides
- D. Amino acids Discuss
- 5. a-amylose is similar to
Options- A. ?-sheets
- B. ?-turned coils
- C. ?-helices
- D. the hydrophobic core Discuss
- 6. Clearly defined nucleus, mitochondria in a large central vacuole and chloroplasts, indicate the group of organisms from
Options- A. bacteria
- B. fungi
- C. plants
- D. animals Discuss
- 7. How many classes of steroid hormones are there?
Options- A. 3
- B. 2
- C. 4
- D. 5 Discuss
- 8. Which of the following is not a type of signaling molecule?
Options- A. Testosterone
- B. Insulin
- C. Thyroxin
- D. Adenylate cyclase Discuss
- 9. The reductant, NADH, transfers the electrons via a flavo-proteins to the specific disulfide (S-S) protein to form a dithiol (SH,SH) protein which converts vitamin
Options- A. B12(Co2+)to B12(Co)
- B. B12(Co) to B12(Co2+)
- C. B12(Co2+)to B12(Co+)
- D. B12(Co+)to B12(Co2+) Discuss
- 10. Triacylglycerols are
Options- A. soluble in water
- B. insoluble in water
- C. soluble in water at elevated temperature
- D. partially soluble in water Discuss
More questions
Correct Answer: 3
Correct Answer: initiation code
Correct Answer: ligase
Correct Answer: Nucleotides
Correct Answer: ?-helices
Correct Answer: plants
Correct Answer: 5
Correct Answer: Adenylate cyclase
Correct Answer: B12(Co2+)to B12(Co+)
Correct Answer: insoluble in water
Comments
There are no comments.More in Biochemistry:
Programming
Copyright ©CuriousTab. All rights reserved.