Gen. Biology 1 - Final Exams Reviewer

Which of the following structures serve as the cell’s boundary from its environment?

• Cell Membrane

• Channel protein

• Cytoplasm

• Mitochondrion

Which of the following is a function of the cell membrane?

• It keeps the cell wall in place.

• It stores water, salt, proteins, and carbohydrates

• It breaks down lipids, carbohydrates, and proteins from food.

• It regulates what substances enter and what substances leave the cell.

Which of the following components of cell membrane help maintain the membrane fluid consistency?

• Carbohydrates

• Cholesterol

• Phospholipids

• Membrane proteins

What makes phospholipid an effective structure to regulate the movement of water and dissolved substances in and out of the cell?

• Amino acids

• Fatty acids and glycerol

• Glucose

• Nucleic acid

What can be found on the outside surface of cell membranes and are attached either to proteins or lipids, forming glycoprotein or glycolipid?

• Carbohydrates

• Cholesterol

• Phospholipids

• Membrane proteins

What is being used to describe cell membrane which means they are made of various tiny molecules that are not rigidly locked into place?

• Fluid mosaic

• Fluid permeable

• Lipid bilayer

• Selective permeable

If the concentration of water inside the cell is 75% and the concentration of water outside the cell is 85%, what would be the mechanism of water?

• Flow into the cell & cause it to swell

• Flow out of the cell & cause it to swell

• Flow into the cell & cause it to shrink

• Flow out of the cell & cause it to shrink

Which of the following requires no energy from the cell, allows particles to move in or out of the cell with their concentration gradient?

• Active transport

• Passive transport

• Pinocytosis

• Phagocytosis

How do enzymes speed up chemical reaction?

• Decreasing activation energy

• Increasing activation energy

• Decreasing deactivation energy

• Increasing deactivation energy

Each enzyme only has 1 substrate that will fit its active site.  What is this property called?

• Denuration

• Fragility

• Reusability

• Specificity