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WorksheetsEXAM III Multiple Choice
Total questions: 25
Worksheet time: 34mins
A membrane is semi-permeable when it
allows all substances to pass through it freely and without restrictions
is closed off completely and nothing can pass through it
only allows specific substances to pass through it
Passive membrane transport ________________________ energy input in the form of ATP, and active transport _________________________.
does not need, does
needs, does not
There is roughly _________ feet of DNA in every cell
1
10
6
1/2
A genetic mutation is a
permanent change in DNA sequence
reversible change in DNA sequence
The cytoplasm on the inside of the cell and the extracellular fluid consist mostly of ______________________.
phosphoric acid
water
chlorine
The green protein is a/an _________________________ protein and the pink protein is a/an ________________ protein.
peripheral, integral
integral, peripheral
What is the function of viral surface proteins?
help the virus metabolize nutrients/"eat"
help the virus recognize cells and other viruses around it
help the virus grow
This type of bacterial staining uses a single solution of one stain, such as methylene blue, in order to better see its shape and structure.
Gram staining
Acid staining
Simple staining
A __________________________ is a membrane-bound sac that moves molecules around the cell
lysosome
peroxisome
vesicle
There are two types of ribosomes- free, which float freely about the cytoplasm, and bound, which are stuck to the _______________________.
smooth endoplasmic reticulum (ER)
golgi body
nucleus
rough endoplasmic reticulum (ER)
Hydrophobic substances ______________ water, and hydrophilic substances ___________________ water.
attract, repel
repel, attract
A _______________ contains hydrolytic enzymes to help digest cell waste and worn-down cell parts.
nucleolus
golgi apparatus
lysosome
vacuole
The first cells ever seen beneath a microscope were _____________________.
bacterial cells
skin cells
cork cells
fern cells
Select the choice that lists the steps of the bacteriophage life cycle in the correct order.
Virus forces the cell to make viral proteins, virus injects its DNA into the cell, viral proteins assemble into zombie virus babies, cell explodes and dies
Virus injects its DNA into the cell, virus forces the cell to make viral proteins, viral proteins assemble into zombie virus babies, cell explodes and dies
Viral proteins assemble, zombie virus babies form, virus injects its DNA into the cell, forces cell to make viral proteins, cell explodes and dies
A cell
is membrane-bound
possesses the fundamental characteristics of life
makes up all living things
contains cytoplasm
all of the above
Phospholipids
constitute cell membranes
dissolve in water
have a polar head and nonpolar tails
are made in lysosomes
are made in the smooth ER
Which organelle is responsible for the production of ribosomes and rRNA?
Nucleolus
Rough ER
Golgi Apparatus
Prokaryotic cells house their DNA in
a nucleus
a vacuole
the cytoplasm
the cell wall
A chromosome consists of
nucleic acids and carbohydrates
nucleic acids and lipids
nucleic acids and proteins
The smooth endoplasmic reticulum (smooth ER) synthesizes
proteins
complex carbohydrates
phospholipids
A plant cell vacuole contains mostly
salts
sugars
fats
water
The ________________________ theory says that some of the organelles in eukaryotic cells were once prokaryotic microbes
endosymbiotic
exosymbiotic
The plasma membrane is called a mosaic because it
contains extremely small organelles
is a mix of several types of molecules (phospholipids, cholesterols, and proteins)
breaks apart on contact
contains glass
Chromosomes contain genetic information in the form of
DNA
histone
centromere
karyotypes
What is the correct sequence of communication between the key players in protein synthesis?
RNA, DNA, ribosome, protein
protein, ribosome, RNA, DNA
DNA, RNA, ribosome, protein
