Question

ras is an important protein involved in cell growth. certain cancers contain an altered form of the ras protein that differs from the normal ras protein by a single amino - acid change. this altered form of ras causes cells to overgrow. which conclusions are supported by this information? select all that apply. the altered form of ras may interact with different cellular proteins than the normal form of ras. the altered form of ras could show changes in all levels of protein structure (primary, secondary, and tertiary). the altered form of ras probably has the same three - dimensional shape as the normal form of ras. the altered form of ras probably has a different three - dimensional shape as compared to the normal form of ras

Explanation:

A single - amino - acid change can alter protein - protein interactions. It can also affect all levels of protein structure (primary due to the amino - acid change, and secondary and tertiary as the new amino - acid may change hydrogen bonding and other interactions). A change in amino - acid sequence usually leads to a different three - dimensional shape.

Answer:

The altered form of Ras may interact with different cellular proteins than the normal form of Ras.
The altered form of Ras could show changes in all levels of protein structure (primary, secondary, and tertiary).
The altered form of Ras probably has a different three - dimensional shape as compared to the normal form of Ras.