AnswersBiology 2 SS26 CR – 070-571200R-T1-PM-EDG-3Cumulative Exam

Cumulative Exam — Cumulative exam Answers

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Which best describes a codon?

A
a cell structure that gives the master instructions for an organism
B
a segment of DNA that is the basis of heredity in organisms
C
the sequence of three bases that codes for a specific amino acid
D
the basic unit of structure and function of all living things
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A plant that has round and yellow seeds (RrYy) is crossed with a plant that has round and yellow seeds (RrYy). What is the ratio of the offspring that will have round and yellow seeds?Key: R = round r = wrinkled Y = yellow y = green

A
1:16
B
3:16
C
8:16
D
9:16
23

Tissue cultures (samples of cancer cells) are taken from cancer patients, and the cells are then grown in a laboratory. What is the purpose of growing cancer cells in a laboratory?

A
to test medicinal treatments before giving them to patients
B
to replace cancer cells with healthy cells
C
to provide evidence of cancer cells in the patient
D
to stop the cancer from growing in the patient
24

The structure of DNA resembles a twisted ladder. Which structural components form the rungs of the ladder?

A
deoxyribose sugars
B
phosphate groups
C
nitrogenous base pairs
D
ribosomes
25

Which is an application of DNA technology in medicine?

A
mapping human genes for manipulation
B
determining specific traits that a baby will have before its conception
C
producing disease resistant humans
D
determining hereditary diseases in individuals and families

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