Exam 3: Cells

The genetic code is a triplet code,which means that:

Genes are segments of DNA that are part of ____________________ in the ____________________ of a cell.

The organic molecule in cell membranes that forms channels is:

The cell organelles that destroy damaged or misfolded proteins are the ____________________ .

Lysosomes are cell organelles that contain ____________________ to destroy pathogens or damaged cellular parts.

The natural motion of molecules provides the energy for the process of ____________________.

The small intestine absorbs water by the process of ____________________.

In the process of active transport,molecules move from an area of ____________________ to an area of ____________________.

A solution with the same salt concentration as human cells is said to be ____________________.

If human cells are placed in a hypertonic solution,they will:

Mitosis involves ____ division(s)to produce ____ cells.

Chromosomes are made of two types of organic molecules: ____________________ and ____________________.

Cell membranes are selectively ____________________,meaning that only certain materials pass through them.

In mitosis,the nuclear membrane disappears and the chromosomes coil up during ____________________.

The ribosomes are cell organelles that:

Most human cells have ____________________ chromosomes,which is the ____________________ number for people.

The presence of ____________________ in a cell membrane will increase the surface area of the membrane.

In mitosis,the chromatids become separate chromosomes during ____________________.

Which of the following statements are true of human chromosomes? (Read carefully and select all of the correct statements.)

Human cells will lose water and shrivel if they are placed in a solution that is ____________________.