Experience the Quality With Free ASVAB Exam Questions That Helps Candidates Pass

A gene is the smallest unit of heredity, carrying instructions for traits through DNA sequences. Chromosomes contain many genes, cells contain chromosomes, and proteins are products of gene expression. GS items often test biology fundamentals like DNA, genes, and inheritance.

Nitrogen comprises about 78% of Earth’s atmosphere, oxygen about 21%, and other gases such as argon and carbon dioxide less than 1%. Hydrogen is extremely rare in the atmosphere. GS questions often test basic environmental science and atmospheric composition.

The Golgi apparatus (or Golgi complex) modifies, sorts, and packages proteins received from the endoplasmic reticulum. Ribosomes (A) make proteins, but do not package or ship them. Lysosomes (C) digest cellular waste, while mitochondria (D) generate ATP. On the ASVAB, you’ll often see questions that require distinguishing between cell structures and their functions. Remember: ribosomes = protein synthesis, mitochondria = energy, lysosomes = digestion, Golgi = packaging and transport.

Humans inhale oxygen and nitrogen, but after respiration the gas primarily added to exhaled air is carbon dioxide (CO₂), a waste product of cellular respiration. Nitrogen is exhaled in roughly the same amount as inhaled. Helium and hydrogen are trace gases. GS tests respiration and human biology often.

Jupiter, the largest planet, has the strongest surface gravity due to its immense mass. Earth’s gravity is 9.8 m/s², while Jupiter’s is about 24.8 m/s². Saturn (C) is also massive but less dense, giving it weaker gravity than Jupiter. Mars (D) has about 0.38 times Earth’s gravity. GS often tests solar system basics: largest, smallest, densest, etc. Remember: Jupiter dominates mass, size, and gravity.