BIOLOGY 1001 TEST 2 2025/2026 EXAM
QUESTIONS AND ANSWERS | 100%
PASS
what is the primary role of DNA in living organisms? - 🧠ANSWER ✔✔to
store and transmit hereditary information
what type of reaction links nucleotides into a polynucleotide - 🧠ANSWER
✔✔dehydration reaction
what is the role of tRNA during protein synthesis - 🧠ANSWER ✔✔carry
amino acids to the ribosome
according to base pairing rules, which base pairs with guanine in DNA -
🧠ANSWER ✔✔cytosine
,what are the three components of a nucleotide - 🧠ANSWER
✔✔nitrogenous base, 5 carbon sugar, phosphate group
what direction are new polynucleotide chains synthesized - 🧠ANSWER
✔✔5' to 3'
in the RNA sequence 5'-AUGCUAACG-3' which of the bases are classified
as pyrimidines - 🧠ANSWER ✔✔Uracil and Cytosine
what type of bond links the sugars of two nucleotides in a polynucleotide -
🧠ANSWER ✔✔phosphodiester bond
what is true about tRNA - 🧠ANSWER ✔✔has a precise 3D shape due to
intrastrand base pairing
what feature of dna allows the generation of two identical copies during cell
division - 🧠ANSWER ✔✔double helix structure where one strand contains
the info to make the complementary strand
what's the term for the arrangement of the two sugar-phosphate backbones
in a DNA double helix - 🧠ANSWER ✔✔antiparallel
where does mRNA synthesis occur in a eukaryotic cell - 🧠ANSWER ✔✔in
the nucleus
,which nitrogenous base is found only in RNA and not in DNA - 🧠ANSWER
✔✔uracil
what is the repeating pattern of molecules in the backbone of a
polynucleotide - 🧠ANSWER ✔✔sugar-phosphate
during gene expression, what is the role of mRNA - 🧠ANSWER ✔✔to
convey genetic instructions from DNA to the ribosome
what is usually the final product of gene expression - 🧠ANSWER ✔✔protein
in the RNA sequence 5'-AUGCUAACG-3', which of the bases are classified
as purines? - 🧠ANSWER ✔✔adenine and guanine
in RNA, which base pairs with adenine - 🧠ANSWER ✔✔uracil
what is the structural difference between DNA and RNA - 🧠ANSWER
✔✔DNA is usually double stranded, RNA is usually single stranded
which process is directly controlled by DNA through an RNA intermediate -
🧠ANSWER ✔✔protein synthesis
what is the term for the entire process by which DNA directs the synthesis
of proteins - 🧠ANSWER ✔✔gene expression
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
, in a DNA double helix, which base pairs with adenine - 🧠ANSWER
✔✔thymine
in RNA, which base pairs with guanine - 🧠ANSWER ✔✔cytosine
in the famous Hershy and Chase blender experiment, radioactive sulphur
was used to label ______ and radioactive phosphorus was used to level
_____. the experiment results demonstrated that the genetic material of a
bacteriophage is _______. - 🧠ANSWER ✔✔protein, DNA, DNA
the two strands that form a DNA double helix are joined to each other
through ______ - 🧠ANSWER ✔✔hydrogen bonds between complementary
nucleotide bases
working with streptococcus bacteria, Griffith showed that dead pathogenic
bacteria cells could ______ living bacteria cells that were ______ into
______ - 🧠ANSWER ✔✔transform, nonpathogenic, pathogenic
what was the conclusion of Griffith's experiment regarding the nature of the
transforming substance - 🧠ANSWER ✔✔it was an unknown heritable
substance
why were proteins initially considered better candidates for genetic material
than DNA - 🧠ANSWER ✔✔proteins were easier to study in the lab
QUESTIONS AND ANSWERS | 100%
PASS
what is the primary role of DNA in living organisms? - 🧠ANSWER ✔✔to
store and transmit hereditary information
what type of reaction links nucleotides into a polynucleotide - 🧠ANSWER
✔✔dehydration reaction
what is the role of tRNA during protein synthesis - 🧠ANSWER ✔✔carry
amino acids to the ribosome
according to base pairing rules, which base pairs with guanine in DNA -
🧠ANSWER ✔✔cytosine
,what are the three components of a nucleotide - 🧠ANSWER
✔✔nitrogenous base, 5 carbon sugar, phosphate group
what direction are new polynucleotide chains synthesized - 🧠ANSWER
✔✔5' to 3'
in the RNA sequence 5'-AUGCUAACG-3' which of the bases are classified
as pyrimidines - 🧠ANSWER ✔✔Uracil and Cytosine
what type of bond links the sugars of two nucleotides in a polynucleotide -
🧠ANSWER ✔✔phosphodiester bond
what is true about tRNA - 🧠ANSWER ✔✔has a precise 3D shape due to
intrastrand base pairing
what feature of dna allows the generation of two identical copies during cell
division - 🧠ANSWER ✔✔double helix structure where one strand contains
the info to make the complementary strand
what's the term for the arrangement of the two sugar-phosphate backbones
in a DNA double helix - 🧠ANSWER ✔✔antiparallel
where does mRNA synthesis occur in a eukaryotic cell - 🧠ANSWER ✔✔in
the nucleus
,which nitrogenous base is found only in RNA and not in DNA - 🧠ANSWER
✔✔uracil
what is the repeating pattern of molecules in the backbone of a
polynucleotide - 🧠ANSWER ✔✔sugar-phosphate
during gene expression, what is the role of mRNA - 🧠ANSWER ✔✔to
convey genetic instructions from DNA to the ribosome
what is usually the final product of gene expression - 🧠ANSWER ✔✔protein
in the RNA sequence 5'-AUGCUAACG-3', which of the bases are classified
as purines? - 🧠ANSWER ✔✔adenine and guanine
in RNA, which base pairs with adenine - 🧠ANSWER ✔✔uracil
what is the structural difference between DNA and RNA - 🧠ANSWER
✔✔DNA is usually double stranded, RNA is usually single stranded
which process is directly controlled by DNA through an RNA intermediate -
🧠ANSWER ✔✔protein synthesis
what is the term for the entire process by which DNA directs the synthesis
of proteins - 🧠ANSWER ✔✔gene expression
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
, in a DNA double helix, which base pairs with adenine - 🧠ANSWER
✔✔thymine
in RNA, which base pairs with guanine - 🧠ANSWER ✔✔cytosine
in the famous Hershy and Chase blender experiment, radioactive sulphur
was used to label ______ and radioactive phosphorus was used to level
_____. the experiment results demonstrated that the genetic material of a
bacteriophage is _______. - 🧠ANSWER ✔✔protein, DNA, DNA
the two strands that form a DNA double helix are joined to each other
through ______ - 🧠ANSWER ✔✔hydrogen bonds between complementary
nucleotide bases
working with streptococcus bacteria, Griffith showed that dead pathogenic
bacteria cells could ______ living bacteria cells that were ______ into
______ - 🧠ANSWER ✔✔transform, nonpathogenic, pathogenic
what was the conclusion of Griffith's experiment regarding the nature of the
transforming substance - 🧠ANSWER ✔✔it was an unknown heritable
substance
why were proteins initially considered better candidates for genetic material
than DNA - 🧠ANSWER ✔✔proteins were easier to study in the lab
