42 multiple-choice questions with explanations for Biochem, Block 1.1: Biology Block: Cell and Hematology. Free, works offline.
Questions
Which three macromolecules are the body's only calorie-yielding nutrients?
An amino acid is catabolized down to acetyl-CoA and cannot be used to synthesize new glucose. What is this amino acid classified as?
Which level of protein structure describes the linear sequence of amino acids in a polypeptide chain?
What small molecule is released when two amino acids join by a peptide bond?
Roughly what fraction of the cell membrane's mass is made up of protein?
A membrane protein spans the full width of the lipid bilayer, with domains exposed on both the extracellular and cytoplasmic sides. What type of membrane protein is this?
The SARS-CoV-2 spike (S) protein binds ACE2 on the surface of human airway, lung, and gut cells. In receptor biology terms, what role does ACE2 play?
Which functional category of protein includes actin and myosin?
On serum protein electrophoresis, which plasma protein produces the band that migrates farthest (fastest) toward the anode?
A patient with nephrotic syndrome has heavy albuminuria, leading to hypoalbuminemia. What is the direct mechanism by which this causes edema?
Which immunoglobulin class is a pentamer and rises first in an acute infection?
Tetracycline inhibits bacterial protein synthesis by which mechanism?
What is the name of the bond that links the phosphate of one nucleotide to the sugar of the next nucleotide, forming the DNA backbone?
A chromosome's short arm and long arm are divided by which landmark structure?
A patient has 47 chromosomes, with an extra copy of chromosome 21. What condition is this?
What is a nucleosome?
Approximately how large is the human genome, in base pairs?
Why does a mature human red blood cell contain no DNA, while a bird's red blood cell does?
What key difference distinguishes DNA replication from PCR?
In RT-PCR testing for an RNA virus like SARS-CoV-2, what does the 'RT' step accomplish?
What happens to introns during mRNA splicing?
During translation, what does a tRNA's anticodon do?