science ch 2

Cytoplasm

A jellylike fluid inside the cell that contains organelles

Which one of the following is not found in prokaryotic cells? A) ribosomes B) a membrane-bound nucleus C) a cell wall D) a capsule

B. a membrane-bound nucleus

Ribosome

Makes proteins

Who contributed to the cell theory

Matthias Schleiden, Theodor Schwann, Rudolf Virchow

euka cell

a cell w out nucleus

what organism is considered an exception to the cell theory because it has a non-cellular structure?

viruses

proka cell

yes for everything except bacteria

Why are you bigger then a first grader

you have more cells

In order to sustain life, all cells must...

-extract energy from food - exchange gas - respond to stimuli

Which statement is a part of the cell theory? 1. all cells come from preexisting cells 2. bacteria are prokaryotic cells 3 eukaryotic cells are complex 4. humans are multicellular

1. all cells come from preexisting cells

The development of the cell theory was most directly related to the 1. improvement of the microscope and microscopic techniques 2. development of the gene-chromosome theory 3. discovery of bacteria and viruses 4. use of a five-kingdom classification system

1. improvement of the microscope and microscopic techniques

Which cell structure is correctly paired with its primary function? 1. ribosome- protein synthesis 2. vacuole- cell division 3. mitochondrion- movement 4. nucleus- storage of nutrients

1. ribosome- protein synthesis

Which statement reflects one of the major components of the cell theory? 1. All living things are multi-cellular. 2. Organs are the basic unit of structure and function for all living things. 3. All cells come from previously existing cells. 4. Every organism has a reproductive system to ensure survival of the species.

3. All cells come from previously existing cells

Which statement is true about viruses? 1. Viruses can eat and metabolize food. 2. Viruses can reproduce on their own at any time 3. Viruses can reproduce only using a host cell. 4. Viruses contain DNA, so they are alive.

3. Viruses can reproduce only using a host cell.

Which cell structure is correctly paired with its primary function? 1. ribosome-movement 2. vacuole-cell division 3. mitochondrion-conversion of food energy into the energy of ATP 4. nucleus-storage of nutrient

3. mitochondrion-conversion of food energy into the energy of ATP

Which of the following structures is not found in bacteria 1. ribosome 2. cytoplasm 3. cell membrane 4. nuclear membrane

3.nuclear membrane

cell

Basic unit of structure

hooke

Discovered cells

What would most likely happen if the ribosomes in a cell were not functioning?

The synthesis of enzymes would stop

Every year people are hospitalized with simple bacterial infections. These infections can result in amputation of the infected area to save the person from death. The persistent use of what modern technology has caused the rise in resistant bacteria?

antibiotics

Which of the following structures are present in all eukaryotic cells?

cell membrane and nuclear membrane

Which structure is found in a plant cell but not in an animal cell? 1. cell wall 2. Cytoplasm 3. cell membrane 4. nucleus

cell wall

The basic unit of structure and function of organisms

cells

tissue

cells that perform the same function

Chromosomes

contains code which guides all cell activities

Nucleus

contains information to run cell - cells brain or computer

Lysosome

digestion center

what is the main difference between the proka and euk cells

eukaryotic cells have a more advanced cellular organization

Because they have the same DNA and come from the same single cell, all of the cells in a human look the same

false

A scientist uses a microscope to examine two slides of living bacteria. Each slide contains a different type of bacteria. While the cells on the first slide are moving rapidly, the cells on the second slide are stationary. Based on these observations, the cells on the second slide most likely have no....

flagella

Muscle cells in athletes often have more mitochondria than muscle cells in nonathletes. Based on this observation, it can be inferred that the muscle cells in athletes

have a greater demand for energy than the muscle cells of nonathletes

Unlike eukaryotes, prokaryotes do not have

membrane bound nucleus

Viruses are considered an exception to the cell theory because they normally reproduce

only in a host cell

Which structures carry out life functions within cells?

organelles

endoreticulum

passageways through the cell

A scraping of material from a person's tooth revealed many bacteria found on the tooth surface. Such bacteria remain ​attached to the tooth surface​​ by structures called

pili

Golgi Bodies

receive and send cell materials

In a cell, information that controls the production of ​proteins/enzymes​​ must pass from the nucleus to the

ribosomes

What structure can be found in all living cells?

ribosomes

Bacteria are classified by what shapes

rod, sphere, spiral

Pieces of the ______ ER called vesicles pinch off and travel other places in the cell to transfer their contents

smooth

cell membrane

stores and releases chemicals

Vacuole

stores food and waste aka the cells warehouse

Plastid

stores food or contains pigment (in plants)