Biology 121 Exam 1 Questions With Complete Solutions
2 Correct Answers max number of electrons in any orbital
47% Correct Answers How much of a cell's dry mass is carbon?
5' cap addition Correct Answers a 7-methylguanosine is added
to the 5' end of the primary transcript (recognition of mRNA by
ribosomes and RNA stability)
5' to 3' Correct Answers What direction does the new RNA
strand grow?
7 Correct Answers water's pH
70-90% Correct Answers Our cells are ________ to ________
water.
94 Correct Answers number of naturally occurring elements
a single spherical orbital Correct Answers The first electron
shell consists of ___________________________.
A:T Correct Answers weaker base-pairing, 2 hydrogen bonds
able to be replicated with few errors Correct Answers Why is
DNA the perfect molecule for cell's genetic material?
acidic substances Correct Answers increase of hydrogen ions,
lower pH
, aldose sugars Correct Answers contain an aldehyde group
alternative splicing Correct Answers one primary transcript can
code for multiple proteins
amino acid Correct Answers the monomeric unit of a protein
aqueous solution Correct Answers solution where water is the
solvent
Archaea Correct Answers prokaryotic organisms with no
nuclear membrane and distinct biochemistry (Halophiles,
Thermocidophiles)
atom Correct Answers the smallest unit of matter that still
retains the properties of an element
atomic mass Correct Answers number of protons and neutrons
atomic number Correct Answers number of protons
Avery, MacLeod, McCarty Experiment Correct Answers
demonstrated that DNA is the genetic material because
degradation of DNA led to a cessation of bacterial
transformation
Bacteria Correct Answers prokaryotic organisms with bacterial
rRNA, no nuclear membrane, and specialized membrane lipids
base stacking Correct Answers nonpolar surfaces of the bases
stack tightly and repel water - contributes to stability
2 Correct Answers max number of electrons in any orbital
47% Correct Answers How much of a cell's dry mass is carbon?
5' cap addition Correct Answers a 7-methylguanosine is added
to the 5' end of the primary transcript (recognition of mRNA by
ribosomes and RNA stability)
5' to 3' Correct Answers What direction does the new RNA
strand grow?
7 Correct Answers water's pH
70-90% Correct Answers Our cells are ________ to ________
water.
94 Correct Answers number of naturally occurring elements
a single spherical orbital Correct Answers The first electron
shell consists of ___________________________.
A:T Correct Answers weaker base-pairing, 2 hydrogen bonds
able to be replicated with few errors Correct Answers Why is
DNA the perfect molecule for cell's genetic material?
acidic substances Correct Answers increase of hydrogen ions,
lower pH
, aldose sugars Correct Answers contain an aldehyde group
alternative splicing Correct Answers one primary transcript can
code for multiple proteins
amino acid Correct Answers the monomeric unit of a protein
aqueous solution Correct Answers solution where water is the
solvent
Archaea Correct Answers prokaryotic organisms with no
nuclear membrane and distinct biochemistry (Halophiles,
Thermocidophiles)
atom Correct Answers the smallest unit of matter that still
retains the properties of an element
atomic mass Correct Answers number of protons and neutrons
atomic number Correct Answers number of protons
Avery, MacLeod, McCarty Experiment Correct Answers
demonstrated that DNA is the genetic material because
degradation of DNA led to a cessation of bacterial
transformation
Bacteria Correct Answers prokaryotic organisms with bacterial
rRNA, no nuclear membrane, and specialized membrane lipids
base stacking Correct Answers nonpolar surfaces of the bases
stack tightly and repel water - contributes to stability
