Biology 1.1 & 1.2

Question 1

Cell Theory (3 parts)

Answer 1

#1. Cells are the smallest unit of life
#2. Cells arise from pre-existing ones
#3. All organisms are made of one or more cells

Question 2

Striated Muscle Cells

Answer 2

make up muscle tissue that we use to move

Question 3

Striated Muscles Description

Answer 3

formed by smaller cells fusing together
all normally large cells
have many nuclei

Question 4

Aseptate fungi

Answer 4

long tube-like structures with many nuclei

Question 5

Giant Algae

Answer 5

single cell that can grow to be 100 mm

has a single nucleus

Question 6

Embryonic Stem Cells

Answer 6

made by fertilizing eggs with sperm & allowing the zygote to develop
can differentiate into any cell type

Question 7

7 Characteristics/Functions of Life

Answer 7

Metabolism, Response, Homeostasis, Growth, Excretion, Reproduction, Nutrition

Question 8

Metabolism

Answer 8

web of all the enzyme catalyzed reactions in a cell

Question 9

Response

Answer 9

living things can respond & interact w/ the environment

Question 10

Homeostasis

Answer 10

maintenance & regulation of internal cell conditions

Question 11

Growth

Answer 11

living things can grow or change in size & shape

Question 12

Excretion

Answer 12

the removal of metabolic waste

Question 13

Reproduction

Answer 13

living things produce offspring either sexually or asexually

Question 14

Nutrition

Answer 14

living things take in material from its environment for growth & repair

Question 15

Prokaryotic Cells

Answer 15

Bacteria (does not enclose DNA in nucleus, and no membrane bound cells) has ribosomes, pilli, flagellum, cytoplasm, cell membrane, DNA, cell wall (divide by binary fission)

Question 16

Eukaryotic Cells

Answer 16

Plants & Animals (enclose DNA in nucleus, membrane bound cell) Rough ER, cell membrane, nucleus, ribosomes, golgi, mitochondria, vacuoles, lysomes,

Question 17

Ribosomes

Answer 17

Site for protein synthesis

Question 18

Eukaryotic chromosomes

Answer 18

only present during cell division

Question 19

Compare Eukaryotic and Prokaryotic Cells

Answer 19

both have a cell membrane, carry out all functions of life, have DNA and ribosomes

Question 20

Davson-Danielli Model

Answer 20

Created a model suggesting that the lipid bilayer was covered on both sides by a thin layer of protein

Question 21

Why the understanding of cell membrane structure has changed over time

Answer 21

electron microscopes showed that not all membranes are symmetrical and a protein layer is not likely because its non-polar

Question 22

Integral proteins

Answer 22

amphipatic properties (hydrophobic and hydrophilic)