Biology and Chemistry
Which of the following is not present in all living organisms?
a. A plasma membrane
b. Presence of DNA
c. Presence of a cytoplasm and ribosomes
d. Presence of a nucleus
d. Presence of a nucleus
Which of the following groups is hydrophobic?
a. hydroxyl
b. carbonyl
c. carboxyl
d. methyl
d. methyl
Which of the following protein structures is created due to the folding of the peptide backbone into pleated sheets or alpha helices?
a. primary structure
b. secondary structure
c. tertiary structure
d. quaternary structure
b. secondary structure
Which enzyme is responsible for sealing the gap between okazaki fragments?
a. Helicase
b. DNA polymerase
c. RNA Primase
d. Ligase
d. Ligase
It refers to the modification of the RNA transcript to become the final messenger RNA (mRNA) which is used to make a protein.
a. Intron
b. Exon
c. RNA processing
d. Splicing
c. RNA processing
Which of the following is not a domain?
a. Protista
b. Archaea
c. Bacteria
d. Eukarya
a. Protista
This macromolecule is made up of amino acids.
a. Carbohydrates
b. Lipids
c. Nucleic acids
d. Proteins
d. Proteins
Which solution would cause an animal cell to shrivel?
a. Hypotonic
b. Isotonic
c. Hypertonic
d. All of the above
c. Hypertonic
Which enzyme is responsible for proofreading?
a. DNA polymerase
b. Single Strand Binding Proteins
c. Topoisomerase
d. RNA polymerase
a. DNA polymerase
What of the following is not a stop codon?
a. UAA
b. UGA
c. UAG
d. UGG
d. UGG
Potassium has an atomic number of 19 and a mass number of 39. How many neutrons does it have?
a. 19
b. 20
c. 39
d. 58
b. 20
mass number = #p + #n
Which of the following macromolecules is held together by phosphodiester linkages?
a. Carbohydrates
b. Lipids
c. Nucleic acids
d. Proteins
c. Nucleic acids
Which of the following organelles is used to carry out cellular respiration?
a. Cell Wall
b. Nucleus
c. Golgi apparatus
d. Mitochondrion
d. Mitochondrion
How many molecules of ATP are produced during pyruvate oxidation?
a. -2
b. 0
c. 2
d. 4
b. 0
What is the mRNA strand created from the following DNA strand: 3’ – TAC GGG AGA TTG GCG – 5’
a. 5’ – AUG CCC UCU AAC CGC – 3’
b. 5’ – ATG CCC TCT AAC CGC – 3’
c. 3’ – AUG CCC UCU AAC CGC – 5’
d. 3’ – ATG CCC TCT AAC CGC – 5’
a. 5’ – AUG CCC UCU AAC CGC – 3’
Which bond is present between two molecules of water?
a. Polar covalent bond
b. Nonpolar covalent bond
c. Hydrogen bond
d. Ionic bond
c. Hydrogen bond
Which of the following molecules is made up of one glycerol molecule, two fatty acid chains, and one phosphate group?
a. Triglycerides
b. Phospholipids
c. Steroids
d. Glycogen
b. Phospholipids
Which of the following organelles contains bound ribosomes essential for protein synthesis?
a. Nucleolus
b. Rough ER
c. Smooth ER
d. Lysosome
b. Rough ER
In which of the following steps of cellular respiration is an anaerobic pathway?
a. Glycolysis
b. Pyruvate oxidation
c. Kreb's Cycle
d. Electron Transport Chain
a. Glycolysis
Translate the previous mRNA strand.
5’ – AUG CCC UCU AAC CGC – 3’
a. MET - ARG - PRO -ASN - SER
b. MET - ASN - PRO - ARG - SER
c. MET - SER - PRO - ARG - ASN
d. MET - PRO - SER - ASN - ARG
d. MET - PRO - SER - ASN - ARG
A solution has a hydroxide ion concentration of 1x10-9. What is the pH of the solution?
a. 1x10-5
b. 5
c. 1x10-9
d. 9
b. 5
Which of the following statements is false?
a. DNA is double stranded and that strands run anti-parallel to each other.
b. RNA transmits genetic information from DNA to protein synthesizers.
c. Both strands of DNA are held together by phosphodiester bonds.
d. RNA has a ribose pentose.
c. Both strands of DNA are held together by phosphodiester bonds.
Which of the following cellular transport methods involves the movement of water molecules from an area of high solvent concentration to low solvent concentration?
a. Simple diffusion
b. Osmosis
c. Facilitated diffusion
d. Exocytosis
b. Osmosis
True or False.
DNA replication is conservative.
False - it is semi-conservative.
In what phase of Meiosis do sister chromatids separate?
a. Metaphase 1
b. Metaphase 2
c. Anaphase 1
d. Anaphase 2
d. Anaphase 2