BIO chapter 4

अब Quizwiz के साथ अपने होमवर्क और परीक्षाओं को एस करें!

stores calcium ions in muscle cells

Smooth endoplasmic reticulum -stores calcium ions in muscle cells. -produces proteins for cell membranes. -helps assemble ribosomes for protein synthesis. -is the major site of carbohydrate synthesis in eukaryotic cells.

E

Which of these is the double membrane that encloses the nucleus?

store DNA

functions of the nucleus

function

in a multicellular, a cell is a unit of

nuclear membrane

it is mainly a large pore filled membrane separating its contents from the cytoplasm

ribosomes

this is not a membrane bound organelle. it is very small and is found in eukaryotes as well as in prokaryotes

microtubules

Which of these are hollow rods that shape and support the cell? -microtubules -microfilaments -plasma membrane -peroxisomes -chloroplasts

rough ER

Which of these manufactures cellular membranes by adding membrane proteins and phospholipids to its own membrane? -lysosomes -rough endoplasmic reticulum -ribosomes -nucleolus -Golgi apparatus

mitochondrion

Which of these organelles carries out cellular respiration? -mitochondrion -chromatin -ribosomes -smooth endoplasmic reticulum -nucleolus

peroxisome

Which of these organelles produces H2O2 as a by-product? -centrioles -mitochondrion -nucleus -flagellum -peroxisome

D

Which of these provides the cell with structural support?

A

Which of these structures stores, modifies, and packages products?

fimbrae

_____ are surface appendages that allow a bacterium to stick to a surface. -Mitochondria -Cell walls -Flagella -Fimbriae -Ribosomes

ribosomes

_____ are the sites of protein synthesis. -Ribosomes -Golgi apparatuses -Microfilaments -Peroxisomes -Mitochondria

Basal bodies

_____ is/are identical in structure to centrioles. -Chromatin -Basal bodies -Microfilaments -Mitochondria -Nuclear envelopes

prokaryotic

________ cells lack a membrane-enclosed nucleus. -Plant -Eukaryotic -Fungal -Prokaryotic

nucleolus

a small round organelle located near the center of the cell used in making ribosomes

chromosomes

these thin threads of DNA and protein remain in their present from until the cell begins to divide

plasma membrane

this cellular organelle contains phospholipids, cholesterol, and transport proteins

cell wall

this cellulose reinforced cell part encloses a plant cell but not an animal cell

mitochondria

this double layered organelle produces ATP from the nutrients it receives

ER

this group of flattened sacs detoxifies poisons that may be found in the body

cytoplasm/cytosol

this is the liquid part of the cell

scanning electron microscope

to examine the ridges and pores on the surface of a pollen grain 8,000 times

scanning electron microscope

type of microscope can produce enhanced versions of a cell surface?

electron microscope

used to study cell surfaces

transmission electron

used to study internal cell structure

chloroplast

what is present in plants and not in animals

protections

what is the function of a bacterium's capsule? -DNA strorage -propulsion -protections -protein synthesis

-must be small bc of damage control -surface-to-volume ratio -more set of instructions, more DNA, and can do more jobs

why million small cells are better than 1 cell

cell surfaces, internal cell structure

A scanning electron microscope is used to study ________, whereas a transmission electron microscope is used to study ________. -live cells; dead cells -cell surfaces; internal cell structures -dead cells; live cells -internal cell structures; cell surfaces

C

Choose the letter that indicates the organelle that contains most of a cell's DNA.

cilia are typically more numerous and shorter than flagella.

Cilia differ from flagella in that -the protein filaments of cilia are "naked," whereas those of flagella are wrapped in an extension of the cell membrane. -cilia are typically more numerous and shorter than flagella. -cilia are anchored only in the proteins of the cell membrane, whereas flagella are anchored in a special structure called the basal body. -cilia contain nine microtubule doublets surrounding a central pair of microtubules, whereas flagella contain only nine microtubule doublets.

have a double membrane ... carry out photosynthesis

Mitochondria and chloroplasts are similar in that they both __________; however, they are different in that only chloroplasts, and not mitochondria, __________. -ave an internal 9 + 2 arrangement of microtubules ... also have centrioles -have many internal membranes that increase their internal surface area ... are found in plants -have a double membrane ... carry out photosynthesis -deal with energy transformations ... are found only in eukaryotes

both plant cells and animal cells

Mitochondria are found in _____. -animal cells and bacterial cells -both plant cells and animal cells -animal cells only -plant cells only

nucleus

Most of the DNA in a eukaryotic cell is in the _____. -nucleolus -endomembrane system -nucleus -mitochondria

plasma membrane

The _____ is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell. -plasma membrane nucleoid region ribosome fimbriae cell wall

Robert Hooke

Responsible for naming cells

nucleolus

Ribosomal subunits are manufactured by the _____. -rough endoplasmic reticulum -peroxisome -nucleolus -lysosome -smooth endoplasmic reticulum

plasma membrane

The _____ is a selective barrier, regulating the passage of material into and out of the cell. -nuclear envelope -nucleus -lysosome -plasma membrane -chloroplast

chromatin

The _____ is composed of DNA and protein. -chromatin -centriole -mitochondrion -ribosome -flagellum

photosynthesis

The function of chloroplasts is -cellular respiration. -lipid synthesis. -intracellular digestion. -photosynthesis

cellular respiration

The function of mitochondria is -intracellular digestion. -lipid synthesis. -photosynthesis. -cellular respiration.

to manufacture ribosomal RNA.

The function of the nucleolus is -to manufacture ribosomal RNA. -to manufacture polypeptides. -intracellular digestion. -to store chromatin.

membrane and proteins secreted by the cell.

The main function of the rough endoplasmic reticulum is the production of -ribosomes and steroid hormones. -membrane and proteins secreted by the cell. -mitochondria and proteins secreted by the cell. -hydrogen peroxide and steroid hormones secreted by the cell.

its need for enough surface area to make exchanges with its environment

The maximum size of a cll is limited by _____. -the materials needed to build it -the amount of flexibility it needs to be able to move -the number of organelles that can be packed inside -its need for enough surface area to make exchanges with its environment

C

The structure that regulates the passage of material into and out of this bacterial cell is indicated by the letter _____.

The Golgi apparatus decreases in size when a cell increases its protein production.

Which of the following statements regarding the Golgi apparatus is false? -The Golgi apparatus works closely with the endoplasmic reticulum. -The Golgi apparatus serves as a molecular warehouse and finishing factory. -The Golgi apparatus decreases in size when a cell increases its protein production. -The Golgi apparatus modifies chemicals received from the endoplasmic reticulum.

The finished products of the Golgi apparatus may leave the cell through vesicles that fuse with the plasma membrane.

What is the relationship between the Golgi apparatus and the plasma membrane? -The finished products of the Golgi apparatus may leave the cell through vesicles that fuse with the plasma membrane. -The plasma membrane stops the products of the Golgi apparatus from leaving the cell. -The Golgi apparatus begins the formation of the lipids that make up plasma membranes. -The membranes of the Golgi apparatus and the plasma membrane are continuous.

cell wall

What name is given to the rigid structure, found outside the plasma membrane, that surrounds and supports the bacterial cell? -capsule fimbriae cell wall flagella nucleoid region

nucloid region

Where is a bacterial cell's DNA found?

smooth ER

Where is calcium stored? -microtubules -smooth endoplasmic reticulum -mitochondria -centrioles -rough endoplasmic reticulum

digestive enzymes

Which of the following are stored in the lysosomes of the cell? -glycoproteins being prepared for secretion from the cell -digestive enzymes -enzymes for detoxifying harmful compounds such as alcohol -material to make ribosomes

peroxisomes

Which of the following cell structures are associated with the breakdown of harmful substances? -peroxisomes -mitochondria -chloroplasts -centrioles

whether or not the cell is partitioned into compartments by internal membranes

Which of the following clues would tell you whether a cell is prokaryotic or eukaryotic? -whether or not the cell is partitioned into compartments by internal membranes -the presence or absence of a rigid cell wall -whether or not the cell contains DNA -the presence or absence of ribosomes

electron microscopes focus electrons beams to create a magnified image of an object

Which of the following statements about electron microscopes is true? -Scanning electron microscopes are used to study the details of internal cell structure. -Specimens must be sectioned to be viewed under a scanning electron microscope. -Transmission electron microscopes are mainly used to study cell surfaces. -Electron microscopes focus electron beams to create a magnified image of an object.

Plant cell walls protect plant cells by forming an impermeable layer around the cell.

Which of the following statements about plant cell walls is false? -Plant cell walls consist of cellulose fibers embedded in a matrix of polysaccharides and proteins. -Plant cell walls protect plant cells by forming an impermeable layer around the cell. -Wood is primarily composed of plant cell walls. -Plant cell walls are multilayered structures.

Once laid down, the elements of the cytoskeleton are fixed and remain permanently in place.

Which of the following statements about the cytoskeleton is false? -The cytoskeleton helps to support cells. -The cytoskeleton plays an important role in amoeboid motion. -The cytoskeleton is composed of three types of fibers: microfilaments, microtubules, and intermediate filaments. -Once laid down, the elements of the cytoskeleton are fixed and remain permanently in place.

The central vacuole of a plant cell may digest chemicals for recycling.

Which of the following statements about the functions of a plant cell central vacuole is false? -The central vacuole of a plant cell may digest chemicals for recycling. -The central vacuole of a plant cell may store poisons. -The central vacuole of a plant cell may store waste products. -The central vacuole of a plant cell may help increase the size of cells by absorbing water.

immobile

an organisms whose cell possess structure

1.cells are the basic building blocks of organisms 2.cells are the units of structure and function in organisms 3.all cells come from pre-existing cells

cell theory

lysosomes

cells can recycle used or damaged organelles using the powerful enzymes in the

internal structures that move

cells have

plant cells

cells that have cell walls and membrane bound organelle are

cytoskeleton

cellular organelles move around the cell through the aid of thin fiber and filaments known as

chloroplasts

chlorophyll is the main pigment found in the cellular organelle known as the

coccus

circular

prevent cells from bursting as a result of the influx of excess water

contractile vacuoles

fixed and remains permanently in place

cytoskeleton is

eukaryotic cells have more intracellular organelles than prokaryotes

difference between prokaryotic and eukaryotic cells

ribosomes

endomembrane system do not have

organelles

eukaryote contain

light microscope

examine living cells lining the respiratory tract

Anton Van Leeuwenhoek

first person to make a light microscope and first person to look at bacteria

to make ribosomes

function of the nucleolus is

contractile vacuoles

if a cell need to remove extra water or liquid wastes, the cellular organelle responsible for this reaction is the

staphylo

in clumps

strep

in lines

mitochondria

large enough to see in the light microscope

use light and lenses to magnify an image

light microscopes

one to view dynamic processes in living cells

light microscopy allows

synthesize proteins from the recycled amino acids

lysosomes do not

the nucleus is an organelle that is surrounded by the cytoplasm

nucleus and the cytoplasm

vacuole

organelle that takes up much of the volume of a plant cell

ER-golgi-vesicles that fuse with plasma membranes

pathway of a synthesized protein that will be secreted by a cell

are hydrophilic and face outward towards the water on both sides of the membrane

phospholipids heads

chloroplast&cell walls; centrioles

plans cells have ___ and ___, animal cells have ____

centrosomes

plant cells dont have

ER

prokaryotic cells do not have

no definite nucleus

prokaryotic cells have

proteins

ribosomes produces

bacillus

rod shape

Theodor Schwann

said all animals are made of cells

Rudolph Virchow

said all cells come from pre-existing cells

water

simplest microscope is

spirillum

spiral- most dangerous

smooth ER

stores calcium ions in muscle cells and detoxifies posions

golgi apparatus

stores modifies, packages material for the cell

nucleoid

structure of prokaryotic cells have a

Matthias Schleiden

studied plotny and stated that all plants have cells

nucloid

the chromosome in a prokaryotic cell are found in?

microscope

the development of the cell theory had to wait for the development of the_________

membrane and proteins secreted by the cell

the function of the rough ER is the production of

lysosome

the organel for digestion

centriole

the organelle that is responsible for cell divions in animal cell is the

microfilaments

the smallest cytoskeleton is

prokaryotic and eukratic

the two basic kinds of cells


संबंधित स्टडी सेट्स

68C Anatomy Ch. 18 Urinary System REVIEW

View Set

Biology 102 Final Review (PRACTICE F1)

View Set