Practice Test 7

Messenger RNA carries a(n) ___________ of the DNA’s instructions out of the nucleus to the ___________.

• exact copy; ribosome

• transcript; ribosome

• exact copy; mitochondria

• transcript; mitochondria

Identify the correct sequence of molecules, as a gene goes from coded information in the nucleus, to the product the cell wants to make.

• DNA -> messenger RNA -> transfer RNA -> protein

• DNA -> transfer RNA -> messenger RNA -> protein

• DNA -> transfer RNA -> protein -> messenger RNA

• Protein -> messenger RNA -> transfer RNA -> DNA

The codon chart shown here uses the three base sequence found on the mRNA molecule after the information is copied from DNA during transcription. If the mRNA message is AAC UAC UGC, what was the original DNA base sequence?

• AAC TAC TGC

• UUG AUG ACG

• TTG ATG ACG

• Asn--Tyr--Cys

Color in the East African cichlid is an inherited trait. Other traits that vary among these fish include teeth and jaw shape. The code for each one of these traits is found in

____________ located within the fish DNA.

• RNA

• chromosomes

• codons

• genes

All organisms contain DNA, and every organism's DNA is made of the same four nucleotides. The differences between organisms is simply based on the order of these nucleotides. Since all organisms have the same basic, universal structure for DNA, which of these must also be universal?

• All organisms have the same proteins.

• All living things must have the same amount of DNA.

• All organisms must be genetically identical to each other.

• All codons in all organisms' DNA code for the same amino acids.

Josh is assigned a project in class to make a strand of m-RNA from DNA.The DNA code that he has been assigned is CGG TCG AGT GAT. What would be the correct code for Josh to use in his transcription?

• GCC AGC TCA CTA

• GCC AGG TGA CTA

• GCC UGC TCA CTU

• GCC AGC UCA CUA

The central dogma of molecular biology is centered upon the process of _________, in which the information from DNA is transcribed and translated, resulting in amino acids being joined into polypeptides.

• replication

• translation

• protein synthesis

• carbohydrate synthesis

A _______ is a segment of a chromosome that codes for a specific protein.

• gene

• codon

• amino acid

• nucleotide

Which sequence of amino acids corresponds with the RNA strand UCG GGG CAC?

• arginine serine glycine

• phenylalanine asparagine

• serine glycine histidine

• arginine tyrosine glutamic acid

On a strand of the mRNA the bases are read in groups of three. What is the correct term for a group of three bases on the strand of mRNA?

• chloroplast

• codon

• chromosome

• nucleus