Biochemistry Questions
Explore questions in the Biochemistry category that you can ask Spark.E!
HMG CoA reductase is inhibited by (select all that apply) A. phosphatase B. kinase C. glucagon D. insulin
What electron carrier is common to both fatty acid and cholesterol biosynthesis? A. FAD+/FADH B. NAD+/NADH C. FMN+/FMNH D. NADP+/NADPH
Which of the following enzymes does aspirin inhibit? A. Hexokinase B. Lipoxygenase C. Prostaglandin synthase D. DG lipase
The pathway of cytosolic fatty acid synthesis in all cells can be affected by which of the following? A. plasma levels of glucagon and insulin B. events transpiring in the glycolysis pathway C. liver acetyl CoA levels during fasting/starvation D. all of the above
During starvation, energy is initially obtained from: A. stored glycogen B. dietary glucose C. glucogenic amino acids D. ketogenic amino acids
Which chemical group on sphingosine attaches to the phosphate group to make sphingomyelin? A. Carboxylate B. Alcohol C. Ketone D. Aldose
Besides the hydroxyl group and the hydrocarbon tail, what other chemical groups can be found on cholesterol? (select all that apply) A. a ketone B. a methyl C. an ethyl D. an aldehyde
Which step of glycolysis is the first ATP-forming reaction?
Purines have a two stringed structure and Pyrimidines only have a one stringed structure
Which enzyme controls the committed step in fatty acid biosynthesis? A. Carnitine acyl transferase B. Fatty acid synthetase C. Acetyl CoA carboxylase D. HMG CoA reductase E. None of the above
After a week of fasting, which of the following classes molecules does the brain utilize the most to produce energy? A. Carbohydrates B. Fatty acids C. Ketone bodies D. Proteins
Is the enol or keto form of pyruvate more stable?
Your patient inquires what food sources provide essential fatty acids. You respond he/she can get EFAs from the following foods: A. Seeds B. Cold water fish C. Vegetable oils D. all of the above
Which reactions are favorable and drive the rest of the reactions of glycolysis?
In the carnitine shuttle, what region of the mitochondria is the site for carnitine attachment to FA-CoA? A. Inner mitochondria membrane B. Outer mitochondria membrane C. Mitochondrial matrix (i.e., inside the mitochondria) D. Space between inner and outer mitochondrial membranes
Which step of glycolysis is the second ATP-forming reaction?
Cellulose is not digestible, but starch is, Cellulose is more compacted than starch, cellulose is used as structure while starch is more commonly used for as energy
If an omega-three fatty acid has has a carbon chain length of 18 carbons, what is the position of the terminal double bond if counting from the carboxyl group of the fatty acid chain? A. between carbons 12-13 B. between carbons 13-14 C. between carbons 14-15 D. between carbons 15-16
Choose the terms that accurately complete the following statement: An oil composed of ______ fatty acids is more likely to be a _______ at room temperature than a (an) _______ fatty acid with the same number of carbons in its hydrocarbon chain. A. saturated - solid - unsaturated B. saturated - liquid - essential C. saturated - liquid - unsaturated D. essential - solid - saturated
The carnitine molecule is used by the carnitine shuttle of the mitochondria to: A. act as a substitute for OAA B. transfer 3-phophoglycerate across mitochondrial membrane C. assist in the inner membrane transfer of fatty acids D. all of the above