Which of These Have Scientists NOT Discovered in Carbonaceous Chondrite

question 60

Multiple Choice

Which of these have scientists NOT discovered in carbonaceous chondrite meteorites?

• A) small glass-rich beads called chondrules
• B) minerals that contain water
• C) amino acids
• D) interior rock that has obviously been melted and resolidified

---

Definitions:

Troponin

A protein complex involved in muscle contraction; often measured to diagnose heart attacks.

Sarcolemma

The thin, plasma membrane that surrounds the cytoplasm of muscle cells, critical in muscle contraction.

Graded Fashion

A term referring to a response that varies in degree or intensity, rather than being an all-or-nothing reaction.

Motor Units Recruited

The activation of a set of motor neurons and their associated muscle fibers, used to generate an appropriate level of force during muscular contraction.