Which of the following statements about DNA is not true?.

• it contains 2 chains of nucleotides

• it contains deoxyribose sugar

• it is replicated in preparation for cell division

• it never leaves the nucleus

• it has the base uracil instead of thymine

Okazaki fragments are used to elongate

• )the leading strand toward the replication fork

• the lagging strand toward the replication fork

• both strands in both directions

• )the leading strand away from the replication fork

• the lagging strand away from the replication fork

The two strands of a DNA molecule are connected by

• hydrogen bonds between the codons and anticodons

• hydrogen bonds between the bases of one strand and the bases of another strand

• hydrogen bonds between deoxyribose sugar molecules of one strand and deoxyribose molecules of the second strand

• covalent bonds between phosphate groups

• covalent bonds between the nitrogen bases

Which of the following cannot form a base-pair?

• Cytosine DNA nucleotide with a Guanine DNA nucleotide

• Adenine DNA nucleotide with a Thymine DNA nucleotide

• Adenine DNA nucleotide with a Uracil RNA nucleotide

• Cytosine DNA nucleotide with a Guanine RNA nucleotide

• Adenine DNA nucleotide with a Thymine RNA nucleotide

Which of the following is true?

• A messenger RNA molecule has the form of a double helix

• Ribosomes contain RNA nucleotides and amino acids

• The uracil nucleotide consists of the uracil nitrogen base, a deoxyribose sugar, and a phosphate group

• When tRNA attaches to mRNA during translation, cytosine bonds to guanine and adenine bonds to thymine

• In eukaryotes, DNA is manufactured in the nucleus and RNA is manufactured in the cytoplasm

All of the following enzymes are involved in DNA replication EXCEPT

• helicase

• DNA ligase

• DNA polymerase

• RNA polymerase

• RNA primase

The end products of translation are

• polypeptides

• amino acids

• lipids

• RNA

• DNA

Which of the following contains the code for a protein?

• DNA polymerase

• RNA polymerase

• rRNA

• tRNA

• mRNA

Tags

NGSS.HS-LS1-1

The DNA of an elephant and the DNA of a cherry tree will probably differ in all of the following aspects EXCEPT the

• kinds of genes for which the DNA codes

• kinds of nucleotides utilized in forming DNA

• number of DNA molecules

• length of DNA molecules

• sequence of DNA nucleotides

Tags

NGSS.HS-LS3-2

Protein synthesis consists of all of the following steps EXCEPT

• replication

• transcription

• translation

• elongation

• initiation