BIO 203 Purdue Exam 1
BIO 203 PURDUE EXAM 1 NEWEST 2025 COMPLETE ALL 100
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||BRAND NEW VERSION!!
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?
a. 0.00001
b. 0.0001
c. 0.001
d. 0.00000001 - ANSWER-d. 0.00000001
Which is wrong?
a. transcription occurs in the nucleus
b. newly synthesized proteins are correctly folded by proteasomes
c. mRNA leaves the nucleus via nuclear pores
d. DNA profiling can involve detecting the number of short tandemrepeats in DNA samples -
ANSWER-b. newly synthesized proteins are correctly folded by proteasomes
Collagen IV is most likely to be found in
a. most ligaments
b. basement membranes
c. tendons
d. areolar connective tissue - ANSWER-b. basement membranes
In a newborn infant exposed to a cold environment
a. blood vessels in the skin dilate
b. apocrine sweat glands become active
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, BIO 203 Purdue Exam 1
c. there is increased blood flow through the epidermis d. thermogenin in brown fat uncouples
ATP production - ANSWER-d. thermogenin in brown fat uncouples ATP production
During interphase, DNA must be accurately replicated because
a. in the next cell division, a faithful copy must be passed on to each of the daughter cells
b. one copy must be transferred from the nucleus to the cytoplasm
c. a backup sequence is needed to guard against mutations
d. cell cycle checkpoints are blocked if only a single copy of DNA is present - ANSWER-a. in the
next cell division, a faithful copy must be passed on to each of the daughter cells
When 1 molecule of glucose is metabolized, 4 carbons appear as carbon dioxide in the Krebs
cycle, and the other two appear as carbon dioxide when
a. glucose is converted to pyruvate
b. oxaloacetic acid is converted to citric acid
c. acetyl-CoA is formed from pyruvate
d. protons couple electron flow to ATP synthesis - ANSWER-c. acetyl-CoA is formed from
pyruvate
The mitotic spindle is attached at each end to two poles formed by the
a. ribosomes
b. centrosomes
c. phagosomes
d. lysosomes - ANSWER-b. centrosomes
Which is considered the normal pH of blood
a. 6.4
b. 8.0
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, BIO 203 Purdue Exam 1
c. 7.0
d. 7.4 - ANSWER-d. 7.4
The LAST step in the catabolism of fats is
a. hydrolysis to fatty acids and glycerol
b. glycogenolysis
c. conversion to triglycerides
d. formation of acetyl-CoA - ANSWER-d. formation of acetyl-CoA
Identify the incorrect statement
a. failure of apoptosis can lead to formation of a tumor
b. in human adults, fully differentiated neurons do not divide
c. nuclear pores allow proteins to enter the nucleus from the cytoplasm
d. chromosomes consist of paired chromatids during G1 phase - ANSWER-d. chromosomes
consist of paired chromatids during G1 phase
Cell that is part of the immune system and is found in the epidermis (BEST answer)
a. keratinocyte
b. fibroblast
c. melanocyte
d. Langerhans - ANSWER-d. Langerhans
Which of the following would be an example of negative feedback
a. increase in heat production when body temperature rises
b. sweating in response to an increase of body temperature
c. excretion of acid when the pH of the body fluids rises
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, BIO 203 Purdue Exam 1
d. excretion of alkali when there is a fall in pH of body fluids - ANSWER-b. sweating in response
to an increase of body temperature
Lubricin is secreted by
a. dendritic cells
b. fibroblast like synoviocytes
c. mast cells
d. macrophages - ANSWER-b. fibroblast like synoviocytes
Which is WRONG
a. the hypodermis contains numerous adipocytes
b. the dermis contains blood vessels and nerves
c. melanocytes synthesize melanin, which is transferred to keratinocytes
d. a first degree burn involves destruction of the epidermis, dermis, and dermal derivatives -
ANSWER-d. a first degree burn involves destruction of the epidermis, dermis, and dermal
derivatives
Heat breaks ------- bonds, causing proteins to denature
a. covalent
b. hydrogen
c. peptide
d. ionic - ANSWER-b. hydrogen
This organelle consists of stacks of flattened membranes derived from endoplasmic reticulum. It
is surrounded by swarms of vesicles.
a. ribosome
b. lysosome
4|Page
BIO 203 PURDUE EXAM 1 NEWEST 2025 COMPLETE ALL 100
QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+||BRAND NEW VERSION!!
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?
a. 0.00001
b. 0.0001
c. 0.001
d. 0.00000001 - ANSWER-d. 0.00000001
Which is wrong?
a. transcription occurs in the nucleus
b. newly synthesized proteins are correctly folded by proteasomes
c. mRNA leaves the nucleus via nuclear pores
d. DNA profiling can involve detecting the number of short tandemrepeats in DNA samples -
ANSWER-b. newly synthesized proteins are correctly folded by proteasomes
Collagen IV is most likely to be found in
a. most ligaments
b. basement membranes
c. tendons
d. areolar connective tissue - ANSWER-b. basement membranes
In a newborn infant exposed to a cold environment
a. blood vessels in the skin dilate
b. apocrine sweat glands become active
1|Page
, BIO 203 Purdue Exam 1
c. there is increased blood flow through the epidermis d. thermogenin in brown fat uncouples
ATP production - ANSWER-d. thermogenin in brown fat uncouples ATP production
During interphase, DNA must be accurately replicated because
a. in the next cell division, a faithful copy must be passed on to each of the daughter cells
b. one copy must be transferred from the nucleus to the cytoplasm
c. a backup sequence is needed to guard against mutations
d. cell cycle checkpoints are blocked if only a single copy of DNA is present - ANSWER-a. in the
next cell division, a faithful copy must be passed on to each of the daughter cells
When 1 molecule of glucose is metabolized, 4 carbons appear as carbon dioxide in the Krebs
cycle, and the other two appear as carbon dioxide when
a. glucose is converted to pyruvate
b. oxaloacetic acid is converted to citric acid
c. acetyl-CoA is formed from pyruvate
d. protons couple electron flow to ATP synthesis - ANSWER-c. acetyl-CoA is formed from
pyruvate
The mitotic spindle is attached at each end to two poles formed by the
a. ribosomes
b. centrosomes
c. phagosomes
d. lysosomes - ANSWER-b. centrosomes
Which is considered the normal pH of blood
a. 6.4
b. 8.0
2|Page
, BIO 203 Purdue Exam 1
c. 7.0
d. 7.4 - ANSWER-d. 7.4
The LAST step in the catabolism of fats is
a. hydrolysis to fatty acids and glycerol
b. glycogenolysis
c. conversion to triglycerides
d. formation of acetyl-CoA - ANSWER-d. formation of acetyl-CoA
Identify the incorrect statement
a. failure of apoptosis can lead to formation of a tumor
b. in human adults, fully differentiated neurons do not divide
c. nuclear pores allow proteins to enter the nucleus from the cytoplasm
d. chromosomes consist of paired chromatids during G1 phase - ANSWER-d. chromosomes
consist of paired chromatids during G1 phase
Cell that is part of the immune system and is found in the epidermis (BEST answer)
a. keratinocyte
b. fibroblast
c. melanocyte
d. Langerhans - ANSWER-d. Langerhans
Which of the following would be an example of negative feedback
a. increase in heat production when body temperature rises
b. sweating in response to an increase of body temperature
c. excretion of acid when the pH of the body fluids rises
3|Page
, BIO 203 Purdue Exam 1
d. excretion of alkali when there is a fall in pH of body fluids - ANSWER-b. sweating in response
to an increase of body temperature
Lubricin is secreted by
a. dendritic cells
b. fibroblast like synoviocytes
c. mast cells
d. macrophages - ANSWER-b. fibroblast like synoviocytes
Which is WRONG
a. the hypodermis contains numerous adipocytes
b. the dermis contains blood vessels and nerves
c. melanocytes synthesize melanin, which is transferred to keratinocytes
d. a first degree burn involves destruction of the epidermis, dermis, and dermal derivatives -
ANSWER-d. a first degree burn involves destruction of the epidermis, dermis, and dermal
derivatives
Heat breaks ------- bonds, causing proteins to denature
a. covalent
b. hydrogen
c. peptide
d. ionic - ANSWER-b. hydrogen
This organelle consists of stacks of flattened membranes derived from endoplasmic reticulum. It
is surrounded by swarms of vesicles.
a. ribosome
b. lysosome
4|Page
