lesson 3

Question 1

____ are the primary building blocks of life. they come in all shapes and sizes.

Answer 1

Cells

Question 2

Some _____ are so small and can only be observed under a microscope. but some are large enough to be held.

Answer 2

Cells

Question 3

it is called the basic unit of life

Answer 3

Cells

Question 4

the smallest cell is the _______ ______, a disease-causing bacteria in birds.

Answer 4

Mycoplasma gallicepticum

Question 5

the cells were first discovered by _____ _____ around 1665

Answer 5

Robert Hooke

Question 6

he was improving the design of a microscope when he decided to observe a piece of cork.

Answer 6

Robert Hooke

Question 7

up close, he saw a box-like structures. These are what we now know as _____ ____

Answer 7

Cell walls

Question 8

who are the proponents of Cell Theory

Answer 8

• Anton Van Leeuwenheok
• Robert Brown
• Felix Dujardin
• Matthias Schleiden
• Jan Evangelista Purkinje
• Theodor Schwann
• Carl Heinrich Braun
• Rudolf Virchow

Question 9

___________ in the 1674 , observed the living cell using the ________ microscope

Answer 9

Anton Van Leeuwenhoek, Leeuwenheok

Question 10

years later _______ _______, in 1883 successfully discovered the nucleus

Answer 10

Robert Brown

Question 11

in 1834, ______ ______, a French biologist discovered the fluid content of the cell, which he called as sarcode.

Answer 11

Felix Dujardin

Question 12

______ ______, a German botanist, revealed in 1838 that all plant tissue was made up of cells.

Answer 12

Matthias Schleiden

Question 13

In the year 1839, _____ ________ _______, or _. __. ________, named the fluid content of cell as protoplasm

Answer 13

Jan Evangelista Purkinje, J.E. Purkinje

Question 14

in 1839, _____ _____ identified animal cell as being comparable to plant cells. he and Schleiden are thus credited with the unifying cell theory that ushered in a new era of productive exploration in cell biology.

Answer 14

Theodor Schwann

Question 15

in 1845, _____ ______ ______ proposed that cell is the basic unit of life.

Answer 15

Carl Heinrich Braun

Question 16

a doctor and pathologist, _____ _____ in the year 1858 recognized that all cells came from pre-existing cells. He proposed the Theory of Biogenesis.

Answer 16

Rudolf Virchow

Question 17

Anton Van Leeuwenheok, in 1674, observed the living cell using the _______ _______

Answer 17

Leeuwenhoek microscope

Question 18

Years later, Robert Brown, in 1883 successfully discovered the ______

Answer 18

nucleus

Question 19

in 1834, Felix Dujardin, French Biologist discovered the fluid content of the cell, which he called as _______

Answer 19

sarcode

Question 20

Matthias Schleiden, a German botanist, revealed in 1838 that all plant tissue was made up of _____

Answer 20

cells

Question 21

in the year 1839, Jan Evangelista Purkinje, or J.E. Purkinje, name the fluid content of cell as ______

Answer 21

protoplasm

Question 22

German scientists Theodor Schwann, Matthias Schleiden, and Rudolph Virchow consecutively developed the classical_____ _____

Answer 22

Cell theory

Question 23

it is a principle in biology that is fundamental to our understanding of all living organisms, summarized into three tenets

Answer 23

Cell theory

Question 24

who is the three German scientist that consecutively developed the Classical Theory

Answer 24

• Theodor Schwann
• Matthias Schleiden
• Rudolph Virchow

Question 25

three theories of cells

Answer 25

1. all organisms are made up of cells. 2. all life functions of an organisms happen within the cell. 3. all cells come from other cells that are already existing.

Question 26

a living organism can be made of just one cell (like an amoeba) or trillions (like the human body)

Answer 26

all organisms are made up of cells

Question 27

that's why cells are often referred to as the basic unit of life. To be considered of life form, something needs to have at least one cell.

Answer 27

all life functions of an organism happen within the cells

Question 28

a cell cannot exist from other cells that are already existing

Answer 28

all cells come from other cells that are already existing

Question 29

water account for 70-75% of the weight of the cell which is essential in our life. The remaining 25-30% of the cell weights account for the organic compounds. These organic compounds are nucleic acid, proteins, lipids, and carbohydrates. The rest of the cell weight is from inorganic compounds which are the cation, anion, and other electrolytes.

Answer 29

Molecular composition of cell

Question 30

water account for ___ - ___ % of the weight of the cell which is essential in our life. The remaining 25-30% of the cell weights account for the organic compounds. These organic compounds are nucleic acid, proteins, lipids, and carbohydrates. The rest of the cell weight is from inorganic compounds which are the cation, anion, and other electrolytes.

Answer 30

70-75%

Question 31

water account for 70-75% of the weight of the cell which is essential in our life. The remaining ___ - ___% of the cell weights account for the organic compounds. These organic compounds are nucleic acid, proteins, lipids, and carbohydrates. The rest of the cell weight is from inorganic compounds which are the cation, anion, and other electrolytes.

Answer 31

25-30%

Question 32

water account for 70-75% of the weight of the cell which is essential in our life. The remaining 25-30% of the cell weights account for the organic compounds. These organic compounds are ____ ____, _____, _____, and ____________. The rest of the cell weight is from inorganic compounds which are the cation, anion, and other electrolytes.

Answer 32

nucleic acids, proteins, lipids, and carbohydrates

Question 33

________ and __________ cells are the two types of cells. __________ cells were the first to appear and occupied Earth for nearly 1.5 billion years. Evidence suggests that _________ cells evolved from some of these ancient cells around 1.8 billion years ago.

Answer 33

prokaryotic, eukaryotic cells

Question 34

________ cells were the first to appear and occupied Earth for nearly 1.5 billion years.

Answer 34

prokaryotic cells

Question 35

Evidence suggests that ______ ______ evolved from some of these ancient cells around 1.8 billion years ago.

Answer 35

eukaryotic cells

Question 36

a ______ ______, which is an outer covering that separates the cell's interior from its surrounding environment.

Answer 36

Plasma membrane

Question 37

_____, the cell's genetic material;

Answer 37

DNA

Question 38

________, which is a jelly-like region within the cell where other cellular components are found; and

Answer 38

cytoplasm

Question 39

_________, which synthesize proteins.

Answer 39

Ribosomes