DNA Structure and Gene Expression (Chapter 25) PRACTISE QUESTIONS

DNA Structure and Gene Expression (Chapter 25)


Fill in the blank,"DNA is a polymer of _________.," using the given terms : amino acids,
nucleic acids, nucleotides, or proteins. Answer Nucleotides


A nucleotide is built from how many subunits? Answer Three


Fill in the blank," The structure of DNA was determined by_____________," using the
given terms :Watson and Crick, Erwin Chargaff, Rosalind Franklin, or Hershey and
Chase. Answer Watson and Crick


Fill in the blank," A purine is always bonded to a pyrimadine. This called___________"
using the given terms : a polynucleotide strand, helical replication, complimentary base
pairing, or diffraction. Answer Complimentary Base Pairing


Fill in the blank," The two DNA strands are antiparallel. This means
that____________.," using the given responses : they run in opposite directions, they
run parallel to each other, the daughter strand is longer than the parent strand, or the
parent strand is longer than the daughter strand. Answer they run in opposite
directions


Fill in the blank," The process of copying one DNA double helix into two identical double
helices is called_______," using the given terms: DNA profiling, DNA base pairing, DNA
transcription, or DNA replication. Answer DNA replication


Which of the following enzymes "unzips" DNA during DNA replication?," using the given
terms: DNA polymerase, RNA polymerase, DNA helicase, or DNA ligase. Answer
DNA helicase

, Fill in the blank," To complete replication, the enzyme_______ seals any breaks in the
sugar-phosphate backbone" using the given terms: DNA polymerase, DNA ligase, DNA
helicase, or transcriptase Answer DNA ligase


Fill in the blank," The nitrogen base________ occurs in RNA in place of thymine.", using
the given terms: adenine, guanine, cytosine, or uracil. Answer Uracil


Fill in the blank," RNA , unlike DNA____________," using the given terms: is single
stranded, is longer, contains only three different nitrogen bases, or contains five
nitrogen bases. Answer is single stranded


Fill in the blank," tRNA transfers_______ to the ribosomes.," using the given terms:
nitrogen bases, polypeptides, amino acids, or proteins. Answer Amino Acids


Fill in the blank," Once formed mRNA carries genetic information from DNA to the
____________," using the given terms: endoplasmic reticulum, ribosomes, Golgi
apparatus, or secretory vesicles. Answer ribosomes


Fill in the blank," During transcription, a segment of the DNA called a _________ serves
as template for the production of a RNA molecule.," using the given terms: codon,
anticodon, promoter, or gene. Answer Gene


Fill in the blank,"A promoter is _____________________," using the given sentences: a
region of DNA that contains a special sequence of nucleotides that beings transcription,
a region of DNA that contains a special sequence of nucleotides that begins translation,
or a region of DNA that contain a special sequence of nucleotides that begins
replication, or region of DNA that contains a special sequence of nucleotides that begins
synthesizing primary mRNA. Answer a region of DNA that contains a special
sequence of nucleotides that begins transcription.