Moroney LSU Biology 1201 Final Exam ALL TESTS

Wolves are sometimes observed to have black coats and blue eyes. Assume that these two traits are unlinked. Assume further that normal coat color (N) is dominant to black (n) and brown eyes (B) are dominant to blue (b). If black male with with blue eyes and a female that is heterozygous for both traits produce offspring, please answer the following question: What percent of the offspring will be normal colored with blue eyes? (Exam 3)

about 1/4

The portion of mitosis where the sister chromatids have separated and are starting to be pulled to the opposite sides of the cell is called_______. (Exam 3)

anaphase

How does an enzyme catalyze a reaction? (Exam 2)

by lowering the energy of activation of a reaction

If the pH of a solution is decreased from pH 7 to pH 5, it means that the... (Exam 1)

concentration of OH- is 100 times less than what it was at pH7

One difference between cancer cells and normal cells is that cancer cells. (Exam 3)

continue to divide even when they are tightly packed together

Which molecule will yield the most energy in aerobic respiration? (Exam 2)

glucose

This process converts glucose into two molecules of pyruvic acid produces 2 ATP's. (Exam 2)

glycolysis

A child born with Down's Syndrome has ______. (Exam 3)

has an extra chromosome 21

You have two copies of chromosome ten, one from your mother and one from your father. These chromosomes are________. (Exam 3)

homologous chromosomes

Which of the following cells are haploid? Exam 3)

human sperm cells

A molecule that has all nonpolar covalent bonds would be... (Exam 1)

hydrophobic

You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). These two classes of DNA probably represent (Exam 2)

leading strands and Okazaki fragments

The mitotic spindle is composed of: (Exam 3)

microtubules

This process consumes O2 converting it to H2O. (Exam 2)

mitochondrial electron transport

This process takes place entirely on the inner membrane of the mitochondria. (Exam 2)

mitochondrial electron transport

A woman is a carrier of the color blind trait and her husband has normal color vision. What percentage of the children will be color blind? (Exam 3)

none of the girls will be color blind but one half of the boys will be color blind

During mitochondrial electron transport, H2O is formed. Where does the oxygen for the synthesis of the water directly come from? (Exam 2)

oxygen (O2)

White blood cells engulf bacteria through what process (Exam 2)

phagocytosis

Which organelle prevents small charged molecules like Na+ from rapidly entering the cell? (Exam 1)

plasma membrane

A bag with an unknown sucrose concentration made of an artificial membrane with pore large enough to let water pass but not sucrose was placed in a solution of 0.5M sucrose. After 20 minutes the bag was removed an it had gotten bigger. Which statement below is probable true? (Exam 2)

the bag had > 0.5M sucrose initially and then concentration gradually decreases

How do the two members of a pair of homologous chromosomes differ from each other? (Exam 3)

the precise sequence of the DNA within each of the chromosomes

Which of the following is true for endergonic reactions? (Exam 2)

the products have more free energy than reactants

Large nucleic acids are synthesized from nucleotide monomers by which process? (Exam 1)

the removal water (dehydration reactions)

While at the store you buy some celery. The cells in the celery stalks are_____. (Exam 1)

alive

What kind of chemical bond is found between paired bases of the DNA double helix? (Exam 2)

hydrogen

When you sprain your ankle there is damage to ligaments and blood vessels. What type of cell division is occurring during the healing process? (Exam 3)

mitosis

Which of the following is NOT a protein function? (Exam 1)

-Catalysis of chemical reactions -Protein is part of hair and ligaments -Communication between cells (hormones) -Proteins are important in our sense of hearing of hearing and vision

Why is water cohesive? (Exam 1)

-One side of the molecule is slightly positive and the other side slightly negative -Water molecules participate in hydrogen bonds.

sulfhydryl group (Exam 1)

-S-H

Which organism below is capable of aerobic respiration? (Exam 2)

-grass -yeast cells -oak trees -mice

Chlorophyll molecules mostly absorb the ________ wavelengths of visible light. (Exam 2)

-red -blue

How many CO2 molecule are produced when one glucose molecule is completely utilized in the process of lactic acid fermentation? (Exam 2)

0

A cell has a diameter of 100 um. What is that length in millimeters? (Exam 1)

0.1mm

An atom having an atomic number of 10 and a mass of 22 would be expected to have_____ neutrons (Exam 1)

12

How many molecules of carbon dioxide (CO2) would be released from the complete aerobic respiration of a molecule of sucrose (C12H22O11), a disaccharide? (Exam 2)

12

What is the OH- concentration of the cola in the preceding question? (Exam 1)

1X10-10M

Flower color in snapdragons is an example of incomplete dominance. If a red flowered plant is crossed with a white flowered plant, the F1 generation has pink flowers. If a pink flowered plants was crossed with a pink flowered plant, the progeny plants would be _____. (Exam 3)

25% red, 50% pink and 25% white

How many CO2 molecules are released by a single pyruvate molecule during aerobic respiration? (Exam 2)

3

What is the approximate atomic mass of an atom with 16 neutrons, 15 protons, and 15 electrons? (Exam 1)

31 daltons

The H+ concentration in a cola is 1X10-4 M. What is the pH of the solution? (Exam 1)

4

How many chromosomes are in a human skin cell that is in the G1 portion of the cell cycle? (Exam 3)

46

One strand of DNA has the sequence 5'A-T-A-A-G-G-A-T-3' (Exam 1)

5' A-T-C-C-T-T-A-T-3'

The atomic weight of water is 18. In 100 grams of water, there are about _____? (Exam 1)

5.6 moles

How many CO2 molecule are produced when one glucose molecule is completely utilized in the process of aerobic respiration? (Exam 2)

6

An element has 8 protons, 9 neutrons, and 8 electrons. Its atomic number and atomic mass, respectively are_____. (Exam 1)

8 and 17

Which source of energy is most directly responsible for ATP synthesis in the chloroplast? (Exam 2)

A pH gradient across the thylakoid membrane

An unequal sharing of electrons between atoms results in... (Exam 1)

A polar covalent bond

Which in the middle of an mRNA sequence below would encode part of a protein with the sequence Thr-Ile-Gly? (Exam 3)

ACCAUUGGC

Wolves are sometimes observed to have black coats and blue eyes. Assume that these two traits are unlinked. Assume further that normal coat color (N) is dominant to black (n) and brown eyes (B) are dominant to blue (b). If black male with with blue eyes and a female that is heterozygous for both traits produce offspring, please answer the following question: What fraction of the offspring would have black coats? (Exam 3)

About 50%

What are "Okazaki fragments"? (Exam 2)

An intermediate of DNA replication made on the lagging strand

The wild type sequence of a portion of an mRNA is: 5'-GGCAAAUGUCUC-3' and the GGC encodes a glycine in the normal sequence. Use the sequences below to answer the next two question. Five mutants mRNA have been found: 5'-GGCAAAUGUCUC-3' Normal sequence A) 5'-GGCACAUGUCUC-3' B) 5'-GGCAAAUGACUC-3' C) 5'-GGCGAAUGUCUC-3' D) 5'GCCAAAUGUCUC-3' E) 5'GGCAAAUGCCUC-3' Which sequence above represents a nonsense mutation? (Exam 3)

B

One strand of DNA has the sequence: C-C-T-T-A-G-A-G. The sequence of the complementary strand is: (Exam 2)

C-T-C-T-A-A-G-G

What type of photosynthesis is done by sugar cane? (Exam 2)

C4-type photosynthesis

Erythrose, a 4 carbon sugar, has the following chemical formula (Exam 1)

C4H8O4

The molecular formula of glucose is C6H12O6. What would be the molecular formula of a polymer mad by linking ten glucose molecules together? (Exam 1)

C60H102O51

This component is found in eukaryotic cells______. (Exam 1)

Carbohydrate lipid protein nucleic acid

Which of the following is a false statement with respect to cellulose? (Exam 1)

Cellulose is a major food source for all animals because it is easily digested

Which of the following would be the same in an enzyme-catalyzed or noncatalyzed reaction? (Exam 2)

D

A strain of bacteria is found that is antibiotic resistant. After mixing a heat-killed, antibiotic-resistant strain of bacteria with a living antibiotic sensitive strain, you discover that some of the living cells are now antibiotic resistant. Since this antibiotic resistance is a heritable trait what do you think happened? (Exam 2)

DNA passed from the heat killed strain to the living room

The making of an exact copy of DNA is called... (Exam 2)

DNA replication

What is the order of information flow during gene expression? (Exam 3)

DNA--> RNA-->Protein

The stage of the cell cycle that occurs immediately after cytokinesis is: (Exam 3)

G1 phase

Which if the following structures directs newly made proteins to their correct location in the cell? (Exam 1)

Golgi Apparatus

In this pedigree, males are squares, females are circles and dark colored symbols indicate individuals with a specific genetic trait. With respect to inheritance of the trait, the genotype for the individual indicated by the arrow may be ______. (Exam 3)

Heterozygous or homozygous dominant

How would you describe the reaction after looking at the diagram in the last question? (Exam 2)

It is exergonic with or without an enzyme

A compound contains hydroxyl groups as its predominant functional group. Which of the following statements is true concerning this compound? (Exam 1)

It should dissolve in water

In pure water about how many of the water molecules are dissociated into H+ and OH-? (Exam 1)

Less than 1 in 1 million water molecules has dissociated

USE THE CODON TABLE Determine the amino acid sequence of the protein that would be produced if the following DNA sequence, 5'-GTCAGTCAG-3' were transcribed and translated. The DNA sequence shown is the template strand. Begin your translation with the first nucleotide. (Exam 3)

Leu-Thr-Asp

The R group of side chain of the amino acid serine is -CH2-OH. The R group or side chain of the amino acid leucine is -CH2-CH-(CH3)2. Where would you expect to find these amino acids in a globular protein in aqueous solution? (Exam 1)

Leucine would be in the interior, and serine would be on the exterior of the globular protein

USE CODING TABLE ON EXAM 3 An mRNA has the sequence: 5'-CCAUGUUAGCGUGAUCCA-3' What amino acid sequence can be translated from the complete open reading frame found in this sequence? (Exam 3)

Met-Leu-Ala

What type of biological molecule(s) is/are inserted into bacteria by bacteriophages to start the viral infection? (Exam 2)

Nucleic acids only

A father has blood type AB and a mother has a blood type B. Which blood type is NOT POSSIBLE among their children? (Exam 3)

O

carboxylic acid (Exam 1)

O // -C \ O-

Neither of your paternal grandparents have cystic fibrosis. Which grandparent is likely to be a carrier of the cystic fibrosis gene? (Exam 3)

One or both grandparents must be a carrier but you don't know who

Chlorophyll molecules are found on _____. (Exam 2)

Photosystem II

The cytoskeleton is composed of______. (Exam 1)

Protein

Which one of the following functional group is important in protein folding? (Exam 1)

R-NH2 R-SH R-COOH R-OH

Which of the following is a difference between RNA and DNA? (Exam 3)

RNA uses the base uracil, while DNA uses the base thymine

What is the main substance that makes up the interior of a potato tuber? (Exam 1)

Starch

The overall three-dimensional shape of a single polypeptide is called the _____. (Exam 1)

Tertiary structure

A couple has a son who is colorblind. Neither parent is color blind. Which parent or parents has/have the color blind trait? (Exam 3)

The mother has the trait, the father does not

In class I did a demonstration of the following reaction: 2H2O2 --> 2H2O+O2 This reaction did not occur until the catalase was added. What did the catalase do? (Exam 2)

The reaction is always exergonic but catalase lowered the activation energy

Which of the following is true for all exergonic reactions? (Exam 2)

The reaction proceeds with a net release of free energy

A codon is GCA. What is the sequence of the corresponding anticodon? (Exam 3)

UGC

Which four elements make up approximately 96% of living matter? (Exam 1)

carbon, hydrogen, nitrogen, oxygen

In which structure below do all of the atoms have reasonable numbers of chemical bonds? (Exam 1)

H | N / \ H H

The selective permeability of biological membranes is dependent on which of the following? (Exam 2)

-The type of transport proteins that are present in the membrane -the lipid bilayer being permeable to primarily small, nonpolar molecules

The wild type sequence of a portion of an mRNA is: 5'-GGCAAAUGUCUC-3' and the GGC encodes a glycine in the normal sequence. Use the sequences below to answer the next two question. Five mutants mRNA have been found: 5'-GGCAAAUGUCUC-3' Normal sequence A) 5'-GGCACAUGUCUC-3' B) 5'-GGCAAAUGACUC-3' C) 5'-GGCGAAUGUCUC-3' D) 5'GCCAAAUGUCUC-3' E) 5'GGCAAAUGCCUC-3' Which sequence above represents a silent mutation? (Exam 3)

E

What is transcription? (Exam 3)

The making of RNA using DNA as the guide

Where is rubisco located in the chloroplast? (Exam 2)

chloroplast stroma

What organelle is shown in the picture? (Exam 1)

Chloroplast

The macromolecule that contains codon is _____. (Exam 3)

mRNA

Wolves are sometimes observed to have black coats and blue eyes. Assume that these two traits are unlinked. Assume further that normal coat color (N) is dominant to black (n) and brown eyes (B) are dominant to blue (b). If black male with with blue eyes and a female that is heterozygous for both traits produce offspring, please answer the following question: What fraction of the offspring would be heterozygous for both traits? (Exam 3)

1/4

The following is a map of four genes on a chromosome. Between which two genes would you expect the highest frequency of recombination? (Exam 3) A_____5_____W_____3_____E____________12____________G

A and G

Which of the structures is an impossible covalently bonded molecular? (Exam 1)

H H | | H - C - C = O - H | H

A couple has a son who is colorblind. Neither parent is color blind. Which parent or parents has/have the color blind trait? Refer back to this question, none of the child's grandparents is color blind. Which grandparent MUST be a carrier of the color blind allele? (Exam 3)

The maternal grandmother

Insulin, a protein secreted by some pancreas cells is made on_____. (Exam 1)

The rough endoplasmic reticulum

You have recently found out that your father is a carrier of the cystic fibrosis trait and your mother is homozygous normal. You do not have cystic fibrosis. What is the chance that you are a carrier of the trait? (Exam 3)

a 1/2 chance

One parent is heterozygous for Dwarfism and the other is homozygous normal, what is the chance that a child of theirs will have Dwarfism? (Exam 3)

a 50% chance

In an alpha helix, a hydrogen atom participates in a covalent bond with a nitrogen atom of one amino acid and also weakly interacts with an oxygen atom. What is this second weaker interaction called? (Exam 1)

a hydrogen bond

Wolves are sometimes observed to have black coats and blue eyes. Assume that these two traits are unlinked. Assume further that normal coat color (N) is dominant to black (n) and brown eyes (B) are dominant to blue (b). If black male with with blue eyes and a female that is heterozygous for both traits produce offspring, please answer the following question: What fraction of the offspring would have blue eyes? (Exam 3)

about 50%

In aerobic cellular respiration, oxygen is directly required in _____. (Exam 2)

accepting electrons at the end of the electron transport chain

Reactants capable of interacting to form products in a chemical reaction must first overcome a thermodynamic barrier known as the reaction's... (Exam 2)

activation energy

Cells have a Na+-K+ ATPase that pumps Na+ out of the cell against the concentration gradient and K+ into the cell, also against the concentration gradient. Why type of transport is this? (Exam 2)

active transport

A chemical reaction that requires energy to take place is called __________. (Exam 2)

an endergonic reaction

A typical mRNA found in the cytoplasm of a eukaryotic cell will have all of the following features EXCEPT: (Exam 3)

an intron

Cellulose does not readily react with O2 forming CO2 and H2O at room temperature because_______. (Exam 2)

at room temperature the activation energy barrier for this reaction cannot be surmounted

The sodium-potassium pump is called an electrogenic pump because it... (Exam 2)

contributes to the membrane potential

Which of the following separates the DNA strands during replication? (Exam 2)

helicase

If a person has two identical alleles, he/she is ___ for that gene. (Exam 3)

homozygous

Different atomic forms of an element contain the same number of protons but a different number of neutrons. What are these different atomic forms called? (Exam 1)

isotopes

What is the effect of a nonsense mutation in a gene? (Exam 3)

it introduces a premature stop codon into the mRNA

the scientific method usually begins with ____. (Exam 1)

making observations

The image(at the right) represents a cell (2n = 8) during _______. ALL of the chromosomes are shown in the drawing. (Exam 3)

meiosis I

Most RNA processing in a eukaryotic cell takes place in the _____. (Exam 3)

nucleus

Which of the following types of the molecules are the major structural components of the cell membrane? (Exam 2)

phospholipids and protein

Which enzyme synthesizes small pieces of RNA to help DNA polymerase start making a new DNA strand during replication? (Exam 2)

primase