Refer to the Following Paragraph and Figure 3

question 22

Multiple Choice

Refer to the following paragraph and Figure 3.1 to answer the following questions) .
Figure 3.1
Since structure correlates so well with function, biochemists are constantly looking for new ways to probe the complex structu proteins in order to understand what they do and how they do it. One of the most powerful techniques in existence today is X crystallography. The main difficulty with this technique is getting the protein to crystallize. Once crystallized, the protein is bombarded with X- rays to create a pattern that can be analyzed mathematically to determine the three- dimensional
structure of the protein. This analysis has been performed by Krzysztof Palczewski on the protein rhodopsin, which is a light- sensitive protein found in species ranging from ancient bacteria archaea) to humans. The structure schematically shown above, where each letter represents an amino acid) is characterized by a single polypeptide chain with several
a- helical segments that loop back and forth across the cell membrane. Another notable feature is the disulfide bond - S- S- ) that can be seen at the bottom of the third transmembrane segment. [Figure adapted from K. Palczewski et al., Science 289 2000) : 739.]
-What is the location of the C- terminus of the protein in Figure 3.1?

• A) nucleus
• B) cytoplasm
• C) extracellular
• D) embedded within the membrane

Recognize sensory adaptation and its impact on perception over time.

Identify the absolute threshold and its significance in sensory processing.

Analyze the role of the pupil in regulating light entry into the eye.

Distinguish between rods and cones in terms of function and location within the eye.

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Definitions:

Internal Oblique

A muscle layer in the abdomen that helps in trunk rotation and bending the body sideways.

External Oblique

A muscle in the abdomen that helps rotate the trunk and flex the vertebral column.

Scapula

The flat, triangular bone located in the upper back, commonly known as the shoulder blade.

Rhomboid Major

A skeletal muscle located in the upper back that connects the spine to the shoulder blade, aiding in retraction of the scapula.