BCHM 2024 Exam 1 Nucleic Acids
Questions & Answers
What three elements make up 98% of the atoms in an organism? - ANSWERShydrogen, oxygen,
and carbon
What biomolecule associated with the plasma membrane makes it selectively permeable? -
ANSWERSproteins
The central dogma illustrates the relationships between which 2 biomolecules? -
ANSWERSnucleic acids and proteins
Are hydrogen bonds unique to water? (Y/N) - ANSWERSNo (oxygen and nitrogen are the most
common electronegative atoms that form hydrogen bonds)
The ___ endoplasmic reticulum helps synthesized and process proteins - ANSWERSrough
The ___ endoplasmic reticulum helps process exogenous chemicals - ANSWERSsmooth
What is a chemical compound containing hydrophilic and hydrophobic portions? -
ANSWERSamphiphile
What enzyme that has an optimal activity at an acidic pH? - ANSWERSpepsin (cleaves nucleic
acid into ~100 base pair fragments)
The 2 Purines are ___ and ___ - ANSWERSadenine and guanine
, The 2 Pyrimidine are ___ and ___ - ANSWERSthymine and cytosine
Genes that are transcribed/expressed frequently are found in which DNA groove? -
ANSWERSmajor groove
DNA is written and synthesized in which direct? - ANSWERS5' to 3'
Which conformational state is DNA in under physiological conditions? - ANSWERSB form
Which conformational state is transient and unstable? - ANSWERSZ form
Which histone is not part of the nucleosome bead? - ANSWERSH1
Are metabolic intermediates common to multiple pathways? (Y/N) - ANSWERSYes (metabolic
pathways are both interdependent and tightly regulated)
Does the human body store excess nitrogenous bases? (Y/N) - ANSWERSNo
What enzyme reduces ribose? - ANSWERSribonucleotide reductase
What is enzyme activity altered by binding of an effector? - ANSWERSallosteric
What does glucose 6-phosphate form? - ANSWERSPRPP
PRPP synthetase synthesizes an ___ form of ribose in PRPP - ANSWERSactive
Ribose 5-phosphate ___ to form sugar ribose - ANSWERScyclized
Questions & Answers
What three elements make up 98% of the atoms in an organism? - ANSWERShydrogen, oxygen,
and carbon
What biomolecule associated with the plasma membrane makes it selectively permeable? -
ANSWERSproteins
The central dogma illustrates the relationships between which 2 biomolecules? -
ANSWERSnucleic acids and proteins
Are hydrogen bonds unique to water? (Y/N) - ANSWERSNo (oxygen and nitrogen are the most
common electronegative atoms that form hydrogen bonds)
The ___ endoplasmic reticulum helps synthesized and process proteins - ANSWERSrough
The ___ endoplasmic reticulum helps process exogenous chemicals - ANSWERSsmooth
What is a chemical compound containing hydrophilic and hydrophobic portions? -
ANSWERSamphiphile
What enzyme that has an optimal activity at an acidic pH? - ANSWERSpepsin (cleaves nucleic
acid into ~100 base pair fragments)
The 2 Purines are ___ and ___ - ANSWERSadenine and guanine
, The 2 Pyrimidine are ___ and ___ - ANSWERSthymine and cytosine
Genes that are transcribed/expressed frequently are found in which DNA groove? -
ANSWERSmajor groove
DNA is written and synthesized in which direct? - ANSWERS5' to 3'
Which conformational state is DNA in under physiological conditions? - ANSWERSB form
Which conformational state is transient and unstable? - ANSWERSZ form
Which histone is not part of the nucleosome bead? - ANSWERSH1
Are metabolic intermediates common to multiple pathways? (Y/N) - ANSWERSYes (metabolic
pathways are both interdependent and tightly regulated)
Does the human body store excess nitrogenous bases? (Y/N) - ANSWERSNo
What enzyme reduces ribose? - ANSWERSribonucleotide reductase
What is enzyme activity altered by binding of an effector? - ANSWERSallosteric
What does glucose 6-phosphate form? - ANSWERSPRPP
PRPP synthetase synthesizes an ___ form of ribose in PRPP - ANSWERSactive
Ribose 5-phosphate ___ to form sugar ribose - ANSWERScyclized
