Chapter 4: Tour of The Cell

Question 1

Cell Theory

Answer 1

states that​

Cells are the basic building blocks of all organisms (living things). ​

All organisms are composed of at least one cell. ​

All cells come only from other living cells.​

Question 2

Magnification & Resolution

Answer 2

Magnification is the increase in an object’s image size compared with its actual size.​

Resolution is a measure of the clarity of an image. In other words, it is the ability of an instrument to show two nearby objects as separate.​

Question 3

Why are Cells so Small?

Answer 3

A) The microscopic size of most cells provides a large surface-to-volume ratio.​

B) The plasma membrane is a phospholipid bilayer with embedded proteins.​

Question 4

Prokaryotes vs. Eukaryotes

Answer 4

All cells have a plasma membrane, D N A, ribosomes, and cytosol.​

Eukaryotic cells are distinguished by having​ a membrane-enclosed nucleus and​ membrane-enclosed organelles that perform functions.​

Prokaryotic cells are smaller and simpler in structure than are eukaryotic cells. This is because prokaryotic cells do NOT have a membrane-enclosed nucleus or other membrane-bound organelles found in eukaryotic cells.​

Question 5

DNA

Answer 5

-In the nucleus
-Nucleus directs protein synthesis by determining the seq. of nucleotides in msgr. RNA during transcription.