Three Lab Groups Carried Out an Experiment to Identify the Concentration

question 40

Multiple Choice

Three lab groups carried out an experiment to identify the concentration of sucrose in six solutions. Each unknown solution (1-6) contained one of the following sucrose concentrations: 0.0 M, 0.2 M, 0.4 M, 0.6 M, 0.8 M, and -1.0 M. Cubes of sweet potato (1 cm3) were soaked for 24 hours in each solution and weighed to determine the change in mass. Each data entry represents the average of three sample replicates expressed as percent change in mass following a 24-hour soak in the unknown solutions. From the data given, which statement below most accurately describes something that has occurred in response to a particular unknown solution?

• A) Unknown solution 5 contains the highest concentration of sucrose, and the change in mass is due to the active transport of sucrose out of the cell.
• B) Osmosis of water molecules from unknown solution 2 likely caused the increase in mass observed.
• C) Passive transport of sucrose out of the potato cells explains the change in mass observed for unknown solution 6.
• D) Unknown solution 3 represents a sucrose concentration slightly higher than the molarity of sweet potato cells, thus water is transported out of the cells.

Grasp the mechanisms involved in protein synthesis, including transcription and translation.

Recognize the structural and functional aspects of DNA.

Describe gene expression regulation at various levels (transcriptional, posttranscriptional, translational, and posttranslational).

Identify the types and impacts of mutations on genes.

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Definitions:

Efficacy

The ability to produce a desired or intended result, often used in the context of therapeutic interventions or medications.

Behavioral Factor

An element of an individual's actions or mannerisms that influences or is determined by their psychological state.

Sexually Transmitted Infections

Infections commonly spread by sexual contact, encompassing a variety of bacterial, viral, and parasitic diseases.

Birth Control

Methods, devices, or medications used to prevent pregnancy as part of family planning or reproductive health.