DNA and Gene Expression

DNA and Gene Expression

Multiple Select

What are the 3 parts of a nucleotide?

• ATP

• deoxyribose sugar

• nitrogen base

• phosphate group

Multiple Choice

What type of bond allows nucleotides to link together, forming the back bone of DNA?

• covalent bond

• hydrogen bond

• ionic bond

• metallic bond

Multiple Choice

What nitrogen base always bond with thymine (T)?

• adenine (A)

• cytosine (C)

• guanine (G)

• thymine (T)

Multiple Choice

What nitrogen base always bonds with guanine (G)?

• adenine (A)

• cytosine (C)

• guanine (G)

• thymine (T)

Multiple Choice

What types of bond allows nitrogen bases to bond, making DNA double stranded?

• covalent bond

• hydrogen bond

• ionic bond

• metallic bond

Multiple Choice

What does DNA look like?

• DNA is a double helix.

• DNA is a single stranded molecule.

• DNA is a single, twisted molecule.

• DNA is double stranded and not twisted.

Multiple Choice

Helicase is the enzyme that performs the first step in DNA replication. What does helicase do?

• adds nucleotides to create a complementary DNA strand

• holds identical copies of DNA together (seen in a chromosome)

• unzips the original DNA strand

Multiple Choice

DNA Polymerase does most of the work during replication. What is the job of DNA polymerase?

• adds nucleotides to create a complementary DNA strand

• holds identical copies of DNA together (seen in a chromosome)

• unzips the original DNA strand

Multiple Choice

When does the cell replicate DNA?

• after cell division (mitosis)

• before cell division

• during cell division

Multiple Choice

What is transcription?

• the process where mRNA is made from a DNA template

• the process where tRNA is made from a DNA template

• The process of copying the DNA

• when the mRA is read and amino acids join together to create a protein

Multiple Choice

Where does transcription occur?

• chloroplast

• mitochondria

• cell membrane

• nucleus

Multiple Choice

What nitrogen base is not found in RNA?

• adenine

• cytosine

• guanine

• thymine

Multiple Choice

Which of the following applies to RNA but not DNA?

• made of nucleotides

• contains cytosine

• single stranded

• contains a sugar

Multiple Choice

Which of the following applies to DNA but not RNA?

• contains guanine

• contains deoxyribose sugar

• made of nucleotides

• found in the nucleus

Multiple Choice

If a DNA strand reads AGT, what would the mRNA look like?

• AGT

• TCA

• UCA

• AGU

Multiple Choice

mRNA is created to transport genetic information to the _____.

• nucleus

• ribosome

• mitochondria

• chloroplast

Multiple Choice

In the ribosome, _____ occurs.

• translation

• transcription

• replication

• the cell cycle

Multiple Choice

During translation, mRNA is read in segments of three bases called _____.

• codons

• anticodons

• hydrogen bonds

• nucleotides

Multiple Choice

The codon UCA codes for:

• serine (Ser)

• leucine (Leu)

• threonine (Thr)

• STOP

Multiple Choice

The codon GGA, codes for:

• asparagine (Asp)

• STOP

• arginine (Arg)

• glycine (Gly)

Multiple Choice

The codon UAG codes for:

• isoleucine (Ile)

• STOP

• valine (Val)

• glutamine (Gln)

Multiple Choice

Translation occurs to create _____.

• proteins

• carbohydrates

• lipids

• nucleic acids, like DNA