BSC1005 MIDTERM MDC NEWEST 2024-2025 ACTUAL
EXAM COMPLETE 100 QUESTIONS AND CORRECT
DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
Cellular respiration can be described as the conversion of the
energy _____. - CORRECT ANSWER-Stored in food molecules
to energy stored in ATP.
Read the following scenario to answer the following question(s).
The earliest cells detectable in fossils were different from the
cells in animals, plants, fungi, and protists living today. These
first prokaryotic cells gave rise to eukaryotic cells approximately
1.7 billion years ago. The structure of eukaryotic cells today
suggests how they might have evolved from their prokaryotic
ancestors. Scientists examining mitochondria and chloroplasts
now think that these organelles were probably free-living
prokaryotes before becoming a part of eukaryotic cells long ago.
Which of the following is a characteristic of chloroplasts that
suggests that they might have evolved from free-living bacteria?
- CORRECT ANSWER-Chloroplast have their own DNA.
,2|Page
The region of an enzyme to which substrate binds is called the
____ site. - CORRECT ANSWER-Active.
The sum total of all the chemical reactions that occur in
organisms is called ______. - CORRECT ANSWER-
Metabolism.
Which of the following structures manufactures the components
of ribosomes? - CORRECT ANSWER-Nucleus.
Why is glycolysis considered to be one of the first metabolic
pathways to have evolved? - CORRECT ANSWER-It does not
involve organelles or specialized structures, does not require
oxygen, and is present in most organisms.
In cellular respiration, most ATP is produced directly as a result
of _____. - CORRECT ANSWER-The movement of hydrogen
ions across the mitochondrial membrane.
During redox reactions, _____. - CORRECT ANSWER-
Electrons are lost from one substance and added to another
substance.
, 3|Page
How many carbon atoms are fed into the citric acid cycle as a
result of the oxidation of one molecule of pyruvate? -
CORRECT ANSWER-Two
Which of the following intermediary metabolites enters the citric
acid cycle and is formed, in part, by the removal of carbon
(CO2) from one molecule of pyruvate? - CORRECT ANSWER-
Acetyl CoA
A child is born with a rare disease in which mitochondria are
missing from certain skeletal muscle cells. Physicians find that
the muscle cells function. Not surprisingly, they also find that
______. - CORRECT ANSWER-The muscles contain large
amounts of lactic acid following even mild physical exercise
Which part of cellular respiration produces the most NADH? -
CORRECT ANSWER-Citric acid cycle.
A product of glycolysis is ____.
A) Lactic Acid
B) Ethyl Alcohol
C) NAD+
D) O2
E) Pyruvic Acid - CORRECT ANSWER-Pyruvis Acid.
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