Bio QUiz Flashcards by Josh Gray

The bond in table salt (NaCl) is
-Covalent
-Nonpolar
-Polar
-Double
-Ionic

Ionic

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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

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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

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Carbohydrates normally function in animals as energy storage molecules.
True or False?

True

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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

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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

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Which of the following provides long-term energy storage for plants?
-ATP
-Glycogen
-Cellulose
-Starch
-Glucose

Starch

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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

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Phospholipids have hydrophilic fatty acids regions and hydrophobic phosphate regions.

True or False?

True

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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

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What name is given to bonds that involve the sharing of electrons?

-Ionic
-Covalent
-Electronic
-Polar
-Hydrogen

Covalent

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The hydrogen and oxygen of a water molecule are held together by ____ bonds

-hydrogen
-electron
-proton
-covalent
-osmotic

Covalent

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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?

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An atoms nucleus is composed of:

protons
protons and electrons
protons and neutrons
neutrons
neutrons and electrons

Protons and neutrons

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The part of the atom of greatest biological interest is the:

-none of the above.
-electron.
-innermost electron shell.
-neutron.
-proton.

electron

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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.

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WHich of the following is insoluble in water?
-salt
-Amino acids
-Sucrose
-DNA
-Olive Oil

Olive Oil

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Which substance is not a compound?
-A carbohydrate
-A nucleotide
-Carbon
-Salt
-Methane

Carbon

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Atoms with either more or fewer neutrons than the usual number for an element are referred to as isotopes.

True
OR
False

True

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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

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Protein function is directly related to their primary structure of amino acids.
True OR False?

True

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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

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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.

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A buffer is essential in living systems to maintain a constant pH.
True OR False?

True

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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