WCU PHYS 261 Wk 1 Quiz Unit 1 and 2
Solved 100% Correct
A protein that no longer functions because its shape has changed (for example, as a
result of heating) has been __________. - ANSWER-denatured
After a meal, blood glucose increases. Increased blood glucose is the stimulus for a
reflex pathway that releases insulin into the blood, and the response is decreased blood
glucose. This is an example of which of the following? - ANSWER-negative feedback
DNA contains the five-carbon sugar - ANSWER-deoxyribose
HCl (hydrochloric acid) is an acid because - ANSWER-in solution it donates its H+.
Hemoglobin molecules are made from four globular protein subunits. The three-
dimensional shape of these globular subunits is an example of which level of protein
structure? - ANSWER-quaternary
Homeostasis is the ability of the body to - ANSWER-quickly restore changed conditions
to normal.
In which type of chemical bonding are the electrons most equally shared between
atoms? - ANSWER-covalent bonds
Interactions between different globular or fibrous polypeptide chains result in which type
of structure? - ANSWER-quaternary
Ions with a negative charge are called - ANSWER-anions
Ions with a positive charge are called - ANSWER-cations
Nucleotides perform which function(s)? - ANSWER-They transfer energy and are part of
genetic material
Oxytocin is a hormone released in response to cervical dilation. This causes more
uterine contractions that will further dilate the cervix. Which type of feedback does
oxytocin trigger? - ANSWER-positive feedback
Part complete
An energy-transferring compound in cells is a nucleotide known as - ANSWER-
adenosine triphosphate
Part complete
Solved 100% Correct
A protein that no longer functions because its shape has changed (for example, as a
result of heating) has been __________. - ANSWER-denatured
After a meal, blood glucose increases. Increased blood glucose is the stimulus for a
reflex pathway that releases insulin into the blood, and the response is decreased blood
glucose. This is an example of which of the following? - ANSWER-negative feedback
DNA contains the five-carbon sugar - ANSWER-deoxyribose
HCl (hydrochloric acid) is an acid because - ANSWER-in solution it donates its H+.
Hemoglobin molecules are made from four globular protein subunits. The three-
dimensional shape of these globular subunits is an example of which level of protein
structure? - ANSWER-quaternary
Homeostasis is the ability of the body to - ANSWER-quickly restore changed conditions
to normal.
In which type of chemical bonding are the electrons most equally shared between
atoms? - ANSWER-covalent bonds
Interactions between different globular or fibrous polypeptide chains result in which type
of structure? - ANSWER-quaternary
Ions with a negative charge are called - ANSWER-anions
Ions with a positive charge are called - ANSWER-cations
Nucleotides perform which function(s)? - ANSWER-They transfer energy and are part of
genetic material
Oxytocin is a hormone released in response to cervical dilation. This causes more
uterine contractions that will further dilate the cervix. Which type of feedback does
oxytocin trigger? - ANSWER-positive feedback
Part complete
An energy-transferring compound in cells is a nucleotide known as - ANSWER-
adenosine triphosphate
Part complete
