Snapshot 1 Lobo Review

The concentration of a substance inside a cell is greater than outside the cell. What type of transport is needed to move molecules of the substance from outside the cell to inside?

Amino acids, glucose, and ions move across the cell membrane. Their movement from a region of high concentration to a region of low concentration is accomplished by special proteins in the membrane, as shown below.

The concentration of water inside a cell is less than outside the cell. What type of transport is needed to move water from outside the cell to inside?

A segment of DNA produces methionine, threonine, histidine, aspartate, and glycine when translated. A substitution mutation occurs and causes the synthesis of the segment as shown. What was the original segment of DNA?

What was the original segment of DNA?

The diagram below represents the cell cycle.

Which phase in the cell cycle follows (goes after) DNA replication?

Which statement correctly distinguishes the functions of proteins from other types of biomolecules?

The characteristics listed below can be used to describe some molecules.

1. inorganic

2. supplies energy and fiber

3. component of plant cell walls

4. part of DNA

5. made of nucleotides

Which of the following statements correctly identifies the location of the hydrogen bonds in DNA?