Bio QUiz Flashcards
The bond in table salt (NaCl) is
-Covalent
-Nonpolar
-Polar
-Double
-Ionic
Ionic
During intense exercise, you produce a lot of heat energy yet your body temperature rises only in small increments. This temperature stability is because water in body fluids releases the heat very quickly.
True or False?
False
Which of the following molecules is stored in adipose tissue and serves as an important source of energy for the human body?
-Glucose
-Phospholipids
-Triglycerides
-Glycogen
Triglycerides
Carbohydrates normally function in animals as energy storage molecules.
True or False?
True
Carbon provides a versatile backbone for macromolecules. With an atomic number of 6, carbon can form up to 4 different covalent bonds.
True or False?
True
Relative to a pH of 6, a pH of 4 has a ______.
100 times higher H+concentration
20 times lower H+concentration
100 times lower H+concentration
20 times higher H+concentration
200 times higher H+concentration
100 times higher H+ concentration
Which of the following provides long-term energy storage for plants?
-ATP
-Glycogen
-Cellulose
-Starch
-Glucose
Starch
DNA
-contains protein-building instructions
-is one of the adenosine phosphates
-is one of the nucleotide coenzymes
-none of these
-all of these
Contains protein-building instructions
Phospholipids have hydrophilic fatty acids regions and hydrophobic phosphate regions.
True or False?
True
A mad scientist has ripped apart an atom and collected all the subatomic particles located in the nucleus of the atom. Which of the following has he collected?
-neutrons and electrons
-protons and neutrons
-protons
-electrons and protons
-electrons
Protons and Neutrons
What name is given to bonds that involve the sharing of electrons?
-Ionic
-Covalent
-Electronic
-Polar
-Hydrogen
Covalent
The hydrogen and oxygen of a water molecule are held together by ____ bonds
-hydrogen
-electron
-proton
-covalent
-osmotic
Covalent
Water will dissolve all of these except
CH3-CH2-OH
sugar
CH3-COOH
salt
CH3-CH2-CH2-CH3
CH3-CH2-CH2-CH3
BECAUSE IT DOESNT HAVE AN OH?
An atoms nucleus is composed of:
protons
protons and electrons
protons and neutrons
neutrons
neutrons and electrons
Protons and neutrons
The part of the atom of greatest biological interest is the:
-none of the above.
-electron.
-innermost electron shell.
-neutron.
-proton.
electron
Which of the following are Isomers?
-sucrose and lactose
-sucrose and glucose
-lactose and maltose
-glucose and fructose
-glucose and sucrose
Glucose and Fructose.
I failed this one.
WHich of the following is insoluble in water?
-salt
-Amino acids
-Sucrose
-DNA
-Olive Oil
Olive Oil
Which substance is not a compound?
-A carbohydrate
-A nucleotide
-Carbon
-Salt
-Methane
Carbon
Atoms with either more or fewer neutrons than the usual number for an element are referred to as isotopes.
True
OR
False
True
What happens when hydrochloric acid (HCl) is added to pure water?
-The HCl molecules separate into H+and Cl-ions.
-The pH of the solution increases.
-The water has a decrease of H+ions
-The concentration of OH-ions increases.
-The HCl molecules float on top of the water.
The HCl molecules separate into H+and Cl-ions
Protein function is directly related to their primary structure of amino acids.
True OR False?
True
Radioisotopes have a number of uses in science and medicine. These uses include
-providing the power supply in heart pacemakers.
-repairing damaged heart tissue
-curing diabetes.
-treating asthma and regulating nerve transmission.
-dating fossils and treating cancer.
Dating fossils and treating cancer
A hydrogen bond is
-a sharing of a pair of electrons between a hydrogen and an oxygen nucleus
-an attractive force that usually involves a polarly-bonded hydrogen atom and another polarly-bonded atom with a partial negative charge
-a sharing of a pair of electrons between a hydrogen nucleus and either an oxygen or a nitrogen nucleus
-the loss of an electron by hydrogen to a highly electronegative atom
-none of these
an attractive force that usually involves a polarly-bonded hydrogen atom and another polarly-bonded atom with a partial negative charge
I got this one wrong.
A buffer is essential in living systems to maintain a constant pH.
True OR False?
True
The structure of a cell membrane includes a modified form of triglyceride called a cholesterol.
True or False?
False
What bond(s) is(are) easily disrupted in aqueous (water) solutions?
-ionic
-covalent
-a and b are correct
-a, b, and c are correct
-polar covalent
a and b are correct
I got this one wrong.
Which of the following is true regarding nucleotides?
-A DNA nucleotide could be made up of ribose, a phosphate, and cytosine.
-There are three different DNA nucleotides.
-DNA nucleotides are assembled into RNA by the process of dehydration synthesis.
-DNA nucleotides contain deoxyribose; RNA nucleotides contain sucrose.
-Nucleotides are bonded together by covalent bonds between the sugars and the phosphates.
Nucleotides are bonded together by covalent bonds between the sugars and the phosphates.
Water molecules are held together by ionic bonds.
True or False?
False
The following molecule is best described as a ______.
CH3—CH2—CH2—CH2
-lipid
-hydrocarbon
-protein
-nucleic acid
-carbohydrate
hydrocarbon
I got this one wrong
What type of lipid is most important in biological membranes?
-phospholipids
-oils
-fats
-triglycerides
-steroids
Phospholipids
The stability of cell membranes is increased by the presence of proteins
True or False?
Got this one wrong
False
Looking into a microscope, you notice cells swimming, propelled by a long tail. What cell structure must these cells have in order to be mobile?
cytoplasm
ribosomes
peroxisomes
smooth ER
flagella
flagella
The process of phagocytosis is important to:
enable cells to take in glucose
enable the kidneys to reabsorb small proteins
enable the kidneys to reabsorb water
enable WBC (white blood cells) to ingest pathogens
I got this one wrong
enable WBC to ingest pathogens
Diet and exercise cause the amount of fat in fat cells to decrease; they do not cause a decrease in fat cell numbers.
True or False?
True
Polar molecules cannot pass across a plasma membrane through the lipid bilayer because they are not soluble in lipids
True or false?
I got this wrong.
True
The cell organelles that are the site of protein synthesis are ribosomes.
True or false?
True
Which of the techniques reveal internal cellular detail?
light micrograph and transmission electron
micrograph
transmission electron micrograph and scanning
electron micrograph
all three micrographs
none of the micrographs
light micrograph and scanning electron micrograph
light micrograph and transmission electron micrograph
Which of the following are associated with rough ER?
DNA
ribosomes
chlorophyll
Lipid Synthesis
Plasma Membrane
Ribosomes
A cell ingests bacteria. What type of transport is likely responsible for this process:
filtration
diffusion
osmosis
endocytosis
exocytosis
endocytosis
Which of the following is NOT an active transport process:
exocytosis
phagocytosis
pinocytosis
facilitated diffusion
endocytosis
facilitated diffusion
Chromosomes are made of DNA, and are found in the nucleus of a cell.
True or false?
True
Pores in a cell membrane are made of proteins.
True or false?
True
Protein secretion involves
Golgi bodies
both Golgi bodies and peroxisomes
both Golgi bodies and endoplasmic reticula
peroxisomes
endoplasmic reticula
I got this one wrong
both golgi bodies and endoplasmic reticula
The Golgi apparatus consists of a stack of flattened membranous sacs associated with swarms of tiny vesicles that are found close to the nucleus.
True or false?
True
The cell organelle that secretes cellular products is the mitochondria
True or false?
The cell organelle that secretes cellular products is the mitochondria
Identify the part of the cell: lysosome
D. a round green ball
The energy for diffusion is:
provided by blood pressure in capillaries
provided by carrier enzymes in cell membranes
provided by ATP within cells
is not required as it is a natural process
is not required as it is a natural process
Glycolysis takes place in the ___ of the cell, and oxygen ___ required.
mitochondria/is
cytoplasm/is not
mitochondria/is not
cytoplasm/is
I got this one wrong.
cytoplasm/is not
In the electron transport system, the energy used to synthesize ATP comes from the diffusion of ________ from the outer compartment of the mitochondria to the inner compartment.
electrons
FADH2
NADH
pyruvate
hydrogen ions
I got this one wrong
hydrogen ions
The concept of a membrane as a fluid mosaic reflects the ability of ______.
most proteins but not phospholipids to drift about in the plane of the membrane
phospholipids but not proteins to drift about in the plane of the membrane
phospholipids and most proteins to drift about in the plane of the membrane
nucleotides to drift into and out of the membrane structure
carbohydrates to drift into and out of the membrane structure
phospholipids and most proteins to drift about in the plane of the membrane
The energy for filtration in the kidneys is provided by blood pressure.
True or false?
I got this wrong
True
White blood cells engulf bacteria by the process of pinocytosis.
True or false?
False
Where does protein synthesis take place?
in the nucleus
on ribosomes
in the Golgi apparatus
on smooth endoplasmic reticulum
in the nucleolus
On ribosomes
Secretory vesicles are generated by
mitochondria
both mitochondria and Golgi bodies
both chloroplasts and mitochondria
Golgi bodies
chloroplasts
Golgi bodies
A solution with a lesser salt concentration than human cells is said to be hypotonic
True or false?
True
If a red blood cell, or any other type of human cell, were placed in a hypotonic solution, water enters the cells, causing them to swell and eventually burst.
True or false?
I got this one wrong
False
What is the function of a cell vacuole?
neither a nor b
a and b
Storage of wastes
Excretion of wastes
I got this one wrong
Storage of wastes
The ultimate stem cell is a fertilized egg because
they are slow growing and thus more stable.
a newly fertilized egg is always free of defects and disease.
it gives rise to all specialized cells in the body.
it will only produce healthy nervous tissue.
it can undergo mitosis.
it gives rise to all specialized cells in the body.
When using a light microscope to view a cell you obtained from scraping under your fingernails, you notice that the cell lacks a nucleus; therefore, you conclude that the cell must be a type of ______ cell.
plant
prokaryotic
animal
eukaryotic
fungal
prokaryotic
The site where ribosomes assemble prior to their migration into the cytoplasm is the:
You Answered
nuclear membrane
plasma membrane
Correct Answer
nucleolus
chromatin
chromosomes
