3 Biochem & Cell Bio Test S25

Lipids are composed mainly of which of the following atoms?

• Carbon, nitrogen and sulfur

• Carbon and hydrogen

• Hydrogen, oxygen, and nitrogen

• Oxygen and nitrogen

When DNA replicates, each original strand of DNA serves as a template for a new strand. What type of replication is this?

• Base-paired replication

• Double helical replication

• Semi-conservative replication

• Anti-parallel replication

Complimentary base pairing between two DNA strands is due to the formation of:

• Operon bonds

• Ionic bonds

• Phosphodiester bonds

• Hydrogen bonds

Match each statement to the type of DNA to which it applies.

Groups:

(a) Plasmid DNA

,

(b) Prokaryotic DNA

,

(c) Eukaryotic DNA

,

(d) All DNA

• Linear, very long pieces of DNA with many thousands of genes

• Small, circular DNA floating in the cytoplasm

• Long, circular DNA with several thousand genes

• Double helix structure of repeating nucleotides

• Contained in a nucleus

• Made of four nitrogenous bases

Transcription begins when RNA polymerase binds to which area on the DNA strand?

• Promoter

• 5' cap

• Poly(A) tail

• Okazaki fragment

Which process occurs at structure W?

• Packaging of molecules

• DNA replication

• Protein Synthesis

• Aerobic respiration

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Where does translation take place in prokaryotes?

• At the vacuoles

• At the lysosomes

• At the ribosomes

• In the nucleus

Which of the following is the primary component of proteins?

• Acetic acids

• Amino acids  

• Nucleotides

• Antibodies

Tags

NGSS.HS-LS1-6

Which of the following is true of proteins with quaternary structure?

• They only have one polypeptide chain

• They contain all known amino acids

• They can have catalytic subunits

• They cannot be denatured

Why are enzymes necessary in living organisms?

• Enzymes are the source of energy for most reactions.

• Enzymes raise the activation energy required for a reaction to proceed.

• Enzymes increase the rate of chemical reactions which would otherwise occur too slowly to sustain life.

Tags

NGSS.HS-LS1-7