What Is the Total Mass of a Binary Star System

question 186

Multiple Choice

What is the total mass of a binary star system with P = 20 yr and a = 10 AU

• A)2 solar masses
• B)2.5 solar masses
• C)0.5 solar mass
• D)80 solar masses
• E)0.4 solar mass

---

Definitions:

Knock-Out Gene

A gene that has been deliberately inactivated or deleted through genetic engineering to study its function by observing the resulting phenotype.

Orthologous Genes

Homologous genes found in different species because they were inherited from a common ancestor.

Antibiotic Medium

A growth medium infused with antibiotics used in laboratory settings to select for or against microorganisms sensitive to the specific antibiotics.

Human DNA Fragments

Short sequences or pieces of human deoxyribonucleic acid (DNA) that result from breaking the molecule into smaller components.