Lecture Exam 1 Review

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons?

• A) 8

• B) 18

• C) 12

• D) 6

The ultimate source of energy flowing into nearly all ecosystems is

• sunlight.

• wind.

• electricity.

• radioactivity.

The molecular formula of most monosaccharides represents a multiple of

• CHO2

• CH3O

• CHO

• CH2O

Which of the following statements regarding cells is false?

• A) All cells can interconvert forms of energy.

• B) All cells have DNA as their genetic material.

• C) All cells are enclosed in a membrane that maintains internal conditions different from the surroundings.

• D) All cells have a cell wall.

To be scientifically valid, a hypothesis must be

• controlled.

• reasonable.

• testable and falsifiable.

• part of a theory.

The function of mitochondria is

• photosynthesis.

• lipid synthesis.

• intracellular digestion.

• cellular respiration.

The tendency of water molecules to stick together is referred to as

• adhesion

• transpiration

• polarity

• cohesion

What is the general function of enzymes within a cell?

• to speed up chemical reactions

• to induce chemical reactions

• to stop chemical reactions

• to promote the synthesis of monomers

Which of the following particles is found in the nucleus of an atom?

• protons and neutrons

• protons and electrons

• only electrons

• only protons

The function of chloroplasts is

• cellular respiration

• intracellular digestion

• photosynthesis

• lipid synthesis