Exam 3: Life Is Cellular

The smallest and most basic units of life are microscopic,self-contained units enclosed by a water repelling membrane and are called ________.

Match the following cellular structures with their primary function (you may need to use a function more than once). -central vacuole

You are a microbiologist working with a species of bacteria that can perform photosynthesis.You know that the enzymes needed to perform photosynthesis in plant cells are closely associated with the membranes in chloroplasts.Where in the bacteria would you expect to find the enzymes needed to perform photosynthesis?

Many important cellular functions in eukaryotic cells occur within membrane-enclosed organelles,such as cellular respiration occurring within the mitochondria.The membranes of the mitochondria provide a place for enzymes needed for cellular respiration to anchor and function.Prokaryotic cells must also carry out respiration but do not have mitochondria.Where is the most likely place that enzymes needed for cellular respiration are anchored and functioning?

A screen door allows breezes to enter and aromas to exit but keeps out insects.Its function most resembles

Match the following cellular structures with their primary function (you may need to use a function more than once). -lysosome

You buy a bunch of small,round,red radishes at the grocery store;they are on sale because they have been sitting in the produce aisle for a while.When you get home you remove the stems and clean them.With the first bite,you notice their texture is not as crisp and crunchy as you like.Your friend says you should refrigerate them in a bowl of water overnight.The next day the radishes are crisp and crunchy again.What is the most likely explanation of why they became crunchy again after soaking in water?

A protein molecule,transferrin,embedded in the plasma membrane recognizes iron molecules and causes the plasma membrane to fold in around the iron and take it into the cell.This is an example of

The endoplasmic reticulum (ER)is a single membrane continuous with the nuclear envelope and a series of interconnected sacs throughout the cell.Why might it be beneficial to the cell for the ER to be continuous with the nuclear envelope?

Prokaryotes and eukaryotes are primarily distinguished by the absence or presence of internal membrane-enclosed organelles.Are prokaryotic cells at an evolutionary disadvantage because they lack organelles?

A solid waste (garbage)transfer facility that sorts and breaks down garbage into recyclables and waste to be thrown away in the landfill would be a suitable analogy for which cellular organelle?

The plasma membrane of some white blood cells contain ________ that bind with proteins of cells such as bacteria that have invaded the human body.These special proteins tell the white blood cells those bacterial cells do not belong to that particular human and to phagocytize (eat)them.