Midterm

Question 1

What are the 7 characteristics of life?

Answer 1

Display order, harness and utilize energy, reproduce, respond to stimuli, exhibit homeostasis, grow and develop, evolve

Question 2

How did Darwin study evolution?

Answer 2

By natural selection

Question 3

What is the plasma membrane made of and how can substances get through it?

Answer 3

It is a bilayer made of lipids and embedded with protein molecules, it is hydrophobic and only some substances can get through by protein channels

Question 4

What does the cytoplasm do?

Answer 4

contains the cytosol and cytoskeleton which holds cell shape and helps with cell division

Question 5

What are the 2 types of prokaryotes?

Answer 5

bacteria and archea

Question 6

What are the four shapes of prokaryotic cells?

Answer 6

cocci, bacilli, spirilla, square cells

Question 7

What are the common features of bacteria and archaea?

Answer 7

DNA, ribosomes, cell wall, pili, flagella

Question 8

What does the plasma membrane do in prokaryotic cells?

Answer 8

Contains molecules that metabolizes food molecules or light energy into the chemical energy of ATP

Question 9

What is a capsule and what does it do?

Answer 9

A layer of polysaccharides surrounding the cell wall that protect bacteria from extreme temp, antibiotics, viruses and antibodies

Question 10

What is the pili made of and what does it do?

Answer 10

Made of proteins and attaches bacterial cells to other cells or eukaryotes as infection

Question 10

Whats a prokaryotic chromosome?

Answer 10

clump of dna packaged into nucleoid, no nucleus

Question 10

What does the cytoplasm do in Eukaryotes?

Answer 10

Contains membrane organelles that are used for energy metabolism, molecular synthesis, storage, and transport

Question 10

whats a plasmid?

Answer 10

small circles of DNA that replicate independently and provide bacteria with genetic advantages ex. Antibiotic resistance

Question 10

What are the 4 Eukarya domains?

Answer 10

protists, fungi, plants, animals