CSULB Bio 207 exam 1 practice

Information contained in DNA sequences (genes) is carried to the site of protein synthesis by

mRNA

in the electronic transport chain, the final component and the last step of aerobic metabolism is

ATP synthase

The Cori cycle is the cycle

where lactic acid from skeletal muscles is transformed into glucose via the liver

the first step in glycolysis is

the conversion of glucose to glucose 9 phosphate

the increase in heart rate before an athletic event or social situation is an example of

feedforward

before pyruvate can enter the citric acid cycle it is first converted to this molecule

acetyl CoA

the sequence of amino acids in the order they appear in a protein is defined as the

primary structure

which of the following cell organelles is involved in protein synthesis

the ribosomes

which of the following is the site of electron transport and oxidative phosphorylation

the mitochondria

the name of the enzyme which converts glucose in the first step of glycolysis is

Hexokinase

which of the following processes occurs in the mitochondria

Kreb's cycle and Electron- transport system

some cells like red blood cells have no mitochondria and therefore can produce

energy only through glycolysis

which of the following is a motor protein with aterograde motion

kinesin

the amino acid with the simplest functional group of hydrogen is

Glycin

Lipids that are "saturated" have

No double bonds

The enzyme pepsin works at this pH most affectively

2

an enzyme

all of the above answers are correct

the three letter code that starts the sequence of all mRNA transcripts, for methionine, is

AUG

which of these nucleotides is a purine

Adenine

in positive feedback mechanisms

Changes in variables are amplified

which of the following is not considered to be connective tissue?

Multicellular exocrine glands

Which of the following is a five carbon sugar

Ribose

the quaternary protein structure is defined as

Two or more polypeptide chains

When a person eats, polysaccharides and disaccharides must be broken down into monosaccharides. This chemical process is called

Hydrolysis

In the formation of glycogen from glucose

Water molecules are produced

The three "letter" designation for amino acid identity in your genetic code is called a

Codon

the nucleotide base that is present in RNA but not DNA is

Uracil

The phase of mitosis where where the chromosomes line up in the middle of the cell is called

Metaphase

Meiosis differs from mitosis because

the final daughter cells have haploid (single) chromosomes

Coenzymes

transport hydrogen atoms and small molecules from one enzyme to another

All enzymes are

Protein molecules

Which of the following is NOT a primary component of nucleic acids

Phospholipid

what components during the translation process brings in new amino acids to complete the primary sequence

tRNA

which of the following is an incorrect base pair in nucleic acids

A-G

A functional group for molecules, containing a nitrogen is called an

Amine

Which of the following best describes the role of oxygen in the body cells?

it is the final electron acceptor from the electron transport chain to become water

The process of forming mRNA from DNA is termed

Transcription

In the formation of peptide bonds between two amino acids

All of the above answers are correct

The largest fluid volume in your body is

Intracellular fluid

In maintain homeostasis, an increase In the concentration of carbon dioxide above its normal range is detected by a(n)

sensor

Sweating is initiated in response to a rise in body temperature that occurs on exposure to a hot environment. Evaporation of the sweat from the surface of the skin cools the body. This is an example of

negative feedback mechanism

The enzyme that begins carbohydrate digestion in your mouth is

Amylase

Which of the following molecules is a monosaccharide?

Glucose

Transport of glucose from high concentration to low concentration, across a membrane, and through a specific carrier protein is called

Facilitated diffusion

Proteins are polymers of

Amino acids

Amino acids in protein are linked together by

Peptide bonds

Extreme temperature and/ or pH can cause a protein to lose its characteristic secondary and tertiary conformation. This is termed

Denaturation

Without oxygen the fate of glucose during glycolysis is

Fermentation

.... Final shape?

Cysteine

The concentration of potassium inside a cell....

150 mM