HW 1

What volume does a eukaryotic cell have in microliters (µl) if treated as a sphere with a radius of 10 microns (µm) and pi is approximated by 3?

4 millionths of one microliter

According to the Endosymbiotic origin theory, which membrane of mitochondria is thought to have evolved from the protozoan ancestor?

outer membrane

Which of the following organelles is surrounded by a single lipid bilayer membrane?

peroxisomes

Which cell components interface with the endoplasmic reticulum to synthesize secreted proteins?

ribosomes

If a eukaryotic cell is treated as a sphere with a radius of 10 microns, what micromolar (µM) concentration should a protein have in a eukaryotic cell for there to be 100 copies of the protein in the cell? Use 6 x 1023 for Avogadro's number.

-3

What is the size of the ribosome in scientific notation?

2.0 x 10 ^1 nm

How many orders of magnitude different in size are typical bacterial cells and typical eukaryotic cells ?

1

10^0

1.00

1L = ________ microliters

10^6

In reference to Figure 1.8 in the book, what is the typical volume of a ribosome in cubic nanometers? Assume the ribosome is a perfect cube

8000 nm^3

which statement is true ? -A typical eukaryotic cell is bigger than a typical bacterial cell. - A typical bacterial cell is bigger than a typical eukaryotic cell. - Typical bacteria and eukaryotic cells are about equally sized. - A typical eukaryotic cell is the same size as an archaeal cell

A typical eukaryotic cell is bigger than a typical bacterial cell

Which of the following is NOT a model organism used in microbiology?

Caenorhabditis elegans

Which structure is used by a paramecium to swim

Cilia

Essential genes, if mutated sufficiently, prevent an organism from growing or surviving.

TRUE

Which cytoskeletal component forms the basis of muscular contraction?

actin filaments

Which organelle is/organelles are physically connected to and continuous with the nuclear membrane?

endoplasmic reticulum

1 cm^3 = ______ µm^3?

trillion