AnswersFL-2000310-Biology 1Cumulative Exam

Cumulative Exam — Cumulative exam Answers

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Which would a scientist most likely do before asking a question that could lead to a scientific experiment?

A
measure plant growth in response to different fertilizers
B
determine the mass of a product from a chemical reaction
C
count the number of seeds that germinated after soaking in water
D
observe the number of tulip plants that sprouted late in a garden
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Which statement best describes the overall change that occurs as a result of mitosis?

A
One cell becomes two cells that have identical copies of DNA.
B
One cell becomes two cells that have different copies of DNA.
C
Two cells become two cells that have identical copies of DNA.
D
Two cells become two cells that have different copies of DNA.
23

Which step in transcription occurs first?

A
mRNA moves the code from the nucleus to the ribosome for protein production.
B
A gene is expressed through protein production.
C
RNA polymerase attaches to the promoter.
D
A repressor protein must attach to the operator.
24

Dr. Katherine Pollard, a biostatistical researcher, recently changed the method that she used to compare human and chimpanzee DNA. Her research showed that the differences between the two species’ DNA are in segments called switches, which turn certain genes on or off. What is the most likely outcome of Dr. Pollard’s research?

A
Other scientists will repeat her analysis and this may lead to changes in theories.
B
The laws of segregation and independent assortment will change.
C
Dr. Pollard will change experimental methods and repeat the study.
D
The hypothesis will be rewritten to match the outcome of the study.
25

Francois Jacob and Jacques Monod studied Escherichia coli (E. coli) bacteria by using lab experimentation. What revision to their initial hypothesis did they come up with?

A
The lac operon is repressed by allolactose.
B
E. coli are unable to process lactose sugar.
C
All E. coli operons are always turned on.
D
Two operons regulate gene control in E. coli.

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