The α helix and β pleated sheet are found in many different proteins because they are formed by A. Hydrogen bonding between the amino acid side chains most commonly found in proteins B. Noncovalent interactions between amino acid side chains and the polypeptide backbone C. Ionic interactions between charged amino acid side chains D. Hydrogen bonding between atoms of the polypeptide backbone E. Hydrophobic interactions between the many nonpolar amino acids
The answer is D. The shape and structure of the two structures are described below: alpha helix -- rodlike and involves only one polypeptide chain beta pleated -- 2D array and can involve one or more polypeptide chains The Alpha Helix is stabilized by the hydrogen bonds that are parallel to the helix axis within the backbone of a single polypeptide chain
What is a synapse? A) a connection between the brain and the spinal cord B) a collection of neurons C) a connection between a neuron and another cell
Obviously, this is a simple question, but in a real tutoring session, I would provide images of the torso, skeletal system, musculature, etc to help with identification. The Answer is option C.
Peter has six times as many dimes as quarters in her piggy bank. She has 21 coins in her piggy bank totaling $2.55 How many of each type of coin does she have?
Let x be the number of quarters. Let 6x be the number of dimes Since one quarter equals 25 cents, x quarters equals x × 25 cents or 25x cents Since one dime equals 10 cents, 6x dimes equals 6x × 10 cents or 60x cents Since one 1 dollar equals 100 cents, 2.55 dollars equals 2.55 × 100 = 255 cents Putting it all together, 25x cents + 60x cents = 255 cents 85x cents = 255 cents 85x cents / 85 cents = 255 cents / 85 cents x = 3 6x = 6 × 3 = 18 Therefore Peter has 3 quarters and 18 dimes