Protein Synthesis

When RNA is being made, the RNA base ____ always pairs with the base ___ in DNA.

• U-T

• T-G

• U-A

• A-U

The central dogma of biology states that genetic information flows in one direction from

• nuclei to RNA to cytoplasm

• ribosomes to proteins to DNA

• genes to nuclei to ribosomes

• DNA to RNA to proteins

The main function of tRNA is to...

• carry a message that, when translated, forms proteins
• form a portion of ribosomes
• string together complementary RNA and DNA strands
• bring amino acids from the cytoplasm to the ribosomes

What is the term for a three-nucleotide sequence on mRNA that codes for an amino acid?

• anticodon

• codon

• nucleotide

• methionine

Which of the following is the site of transcription?

• vacuole
• lysosome
• nucleus
• ribosome

Which of the following is the site of translation?

• vacuole
• lysosome
• nucleus
• ribosome

The DNA sequence ATCAGCGCTGGC is part of a gene. how many amino acids are coded for by this message?

• 4

• 8

• 12

• 20

A scientist puts nucleotide chains of UUUUUU in a test tube under conditions allowing protein synthesis. Soon they are only amino acids chains of phenylalinine. What does the experiment indicate?

• phenylalanine is composed of uracil
• UUU codes for phenylalanine
• protein synthesis malfunctions in test tubes
• proteins contain one kind of amino acids

Tags

NGSS.HS-LS1-1

DNA sequence is ACAGTGC. What would the transcribed mRNA be?

• TGTCACG

• UGUCACG

• GUGACAU

• CACUGUA

Which of the following sequences of processes correctly reflects the central dogma?

• protein synthesis, transcription, translation
• protein synthesis, translation, transcription
• transcription, translation, protein synthesis
• translation, transcription, protein synthesis