The Type of Galaxy That Sometimes Has a Distinct Bar

question 9

Multiple Choice

The type of galaxy that sometimes has a distinct bar of stars running across the central region is

• A) spiral
• B) elliptical
• C) dwarf elliptical
• D) irregular
• E) all of the above can have clear, distinct central bars

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Definitions:

ATP

Adenosine triphosphate, a molecule that provides energy to drive many processes in living cells, acting as a universal energy currency.

Tropomyosin

A regulatory protein in muscle cells that blocks the binding site for myosin on actin molecules, preventing muscle contraction in the absence of calcium.

F-actin Double Helix

A structural configuration of actin filaments arranged in a twisted double helix, significant in muscle contraction and cell movement.

Protein

Large molecules made up of amino acids that perform a variety of functions in the body, including structural support, enzyme catalysis, and transportation.