Purdue BIO 203 Practice Exam 1 Latest Update 2025-2026 50 Questions and 100% Verified Correct Answers Guaranteed A+
A 67-year old man presents with symptoms of chronic kidney disease (CKD). Which of the following is most likely to be true?
- low cutaneous 7-dehydrocholesterol
- low serum calcitriol
- low blood potassium
d. increase of bone mass - CORRECT ANSWER: b. low serum calcitriol
A hydrogen ion consists of
- one electron and one proton
- two electrons and two protons
- one electron and two protons
d. no electrons and one proton - CORRECT ANSWER: d. no electrons and one proton
A protein is observed to denature in solutions at or below a pH of 6.0. At which of the following hydrogen ion concentrations (g/L) would this protein be safe from denaturation?
- 0.00001
- 0.0001
- 0.001
d. 0.00000001 - CORRECT ANSWER: d. 0.00000001
Aquaporins
- form water channels 1 / 2
- form a bilayer in the plasma membrane
- contain phosphatidylcholine
d. are clustered in the hydrophobic region of the membrane - CORRECT ANSWER: a.
form water channels
ATP is a
- protein
- phospholipid
- nucleotide
d. trisaccharide - CORRECT ANSWER: c. nucleotide
Cell that is part of the immune system and is found in the epidermis (BEST answer)
- keratinocyte
- fibroblast
- melanocyte
d. Langerhans - CORRECT ANSWER: d. Langerhans
Collagen IV is most likely to be found in
- most ligaments
- basement membranes
- tendons
d. areolar connective tissue - CORRECT ANSWER: b. basement membranes
Combination of CoA with the two-carbon fragment formed from pyruvate the
- cell cytoplasm
- mitochondrial matrix
- inner mitochondrial membrane
- / 2