Biochemistry Questions

Glucogenic amino acids are utilized in the gluconeogenic pathway of the liver. A. True B. False

The cofactor found in the active site of ALL transaminase enzymes is A. Cobalamin phosphate B. Pyridoxal phosphate C. Ferrodoxin D. Biotin

Which two amino acids are NOT substrate for aminotransferases? A. Alanine and aspartate B. Serine and threonine C. Oxaloacetate and malate D. Leucine and isoleucine

Which organ is responsible for bile salt synthesis? A. liver B. kidney C. gonads D. adrenal gland

Which lipoprotein complexes handle TAG transport in the bloodstream? A. LDL, HDL B. VLDL, chylomicrons C. chylomicrons, HDL D. LDL, VLDL

Which lipoprotein complexes handle TAG transport in the bloodstream? A. HDL and chylomicrons B. LDL and VLDL C. LDL and HDL D. VLDL and chylomicrons

What metabolic pathway(s) make ATP from the electron carriers that come off of the fatty acid oxidation pathway? A. glycolysis, pentose phostphate, TCA B. TCA, oxidative phosphorylation C. oxidative phosphorylation only D. pentose phosphate, TCA, oxidative phosphorylation

Polarity in DNA and RNA refers toA. Heavily charged phosphatesB. 5'-3' directionalityC. Insolubility in aqueous solutionD. Nitrogenous basesE. Sugar carbons

Which lipoprotein complexes are rarely detected in the plasma: A. HDL B. VLDL C. LDL D. IDL

All of the following are molecular components of nucleic acids except:A. 5 carbon sugarsB. Nitrogenous BasesC. 6 carbon sugarsD. Resonance structuresE. Phosphate molecules

With regard to the ketogenesis process, which of the following is correct? A. In the liver, acetoacetyl-CoA is made from 2 acetyl CoA molecules B. The liver can use ketone bodies as energy sources C. At the target tissues, ketone bodies must eventually be converted to acetoacetate D. All the above

HMG CoA reductase levels in liver cells is regulated by (select all that apply) A. specific proteases B. transcriptional factors C. geranyl-modified proteins D. apolipoproteins

What role does HDL play in cardiovascular disease? A. Major contributor to plaque deposits B. Can scavenge deposited cholesterol from vessel walls C. Reduces inflammatory response to vessel lumen damage D. All of the above

Which of the following is least likely to be found in dsRNA?A. GuanineB. UracilC. RiboseD. AdenineE. Thymine

The inner mitochondrial membrane can transport A. acyl-carnitine B. fatty acids C. acetyl-CoA D. malonyl-CoA

Bisphosphonates act as inhibitors of which step(s) in cholesterol biosynthesis? A. Formation of geranyl PP from isopentenyl-5-pyrophosphate B. Formation of mevalonic acid from 3-hydroxy-3-methylglutaryl CoA C. Formation of farnesyl PP from isopentenyl-5-pyrophosphate D. Formation of isopentenyl-5-pyrophosphate from mevalonate-5-pyrophosphate

What is the role of HDL? A. carry synthesized TAGs from liver to adipose tissue B. carry synthesized cholesterol from liver to tissues and back if not used C. carry dietary TAGs to liver and other tissues D. collect cholesterol from tissues and return it to the liver

The most abundant non-phospholipid component of the cell membrane is: A. Cholesterol B. Deoxycholate C. Macroglobulin D. Triacyglyceride

Maltose- sugar in beer, Lactose- sugar in milk, Sucrose- table sugar derived from plants

Which of the following is (are) responsible for transporting dietary fats and cholesterol to the liver? (select all that apply) A. bile salts B. VLDLs C. HDLs D. chylomicrons