The primary structure of a protein is determined by ________

A) the sequence of amino acids
B) a series of helical domains
C) hydrogen bonds formed between the components of the peptide linkage
D) pleated sheets
E) covalent bonds formed between fibroin residues


Answer: A

Biology & Microbiology

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Choose all that apply. A concentration gradient is exhibited when

_____ the room temperature is 34 degree Celsius and the outside air is 34 degrees Celsius. _____ intracellular fluid has 5% solute and extracellular fluid has 0.8% solute concentration. _____ during rest, muscle and liver cells contain high glycogen concentration and blood contains lower concentrations. _____ the pCO2 changes from 45 to 35 mmHg  in the alveoli of lungs.

Biology & Microbiology

A normally functioning pancreas produces insulin, a hormone that causes cells to ____

a. produce glucagon b. take up and store glucose c. synthesize protein d. break down glucose e. produce glucagon

Biology & Microbiology

The structure in Figure 25-1 labeled C is:


a. a ribosome.
b. the plasma membrane.
c. the capsule.
d. the cell wall.
e. the flagellum.

Biology & Microbiology

After finding a new medicinal plant, a pharmaceutical company decides to determine if the plant has genes similar to those of other known medicinal plants. To do this, the company annotates the genome of the new plant to _____

A) determine what proteins are produced B) determine what mRNA transcripts are produced C) identify genes and determine their functions D) identify the location of mRNA within the plant cells

Biology & Microbiology