Molecular Genetics

A codon is a sequence of three nucleotides that code for an amino acid. If the DNA sequence shown here goes through transcription and translation, how many amino acids will result from this sequence?

ACTAGTGAT

• 5

• 4

• 2

• 3

Tags

NGSS.HS-LS1-1

Why do cells need both tRNA and mRNA?

• Only tRNA bends into a shape that can carry specific amino acids.

• Only mRNA can be used to repair mistakes in the DNA sequence.

• The tRNA in used on the ribosomes and the mRNA is used in the nucleus.

• The mRNA brings information to the nucleus for the tRNA to use.

A cell is replicating its DNA. Part of the DNA strand reads A-C-C-G-T-A-C. The new strand built off this section reads T-G-G-A-A-T-G. What effect might this have when the DNA replicates in the future?

• Cells having the new DNA version will look or operate differently from cells with the original DNA.

• Only the sections of DNA without mistakes will be used in the future so the DNA strand will shorten.

• The DNA will be exactly like the original since only the original strand of DNA is used as a template.

• When the new strand is used as a template the strand built from it will differ from the original DNA.

Tags

NGSS.HS-LS3-2

Which process is shown in the diagram

• Mitosis

• Meiosis

• Transcription

• Translation

Tags

NGSS.HS-LS1-4

Transcription must occur in order for proteins to be synthesized. What is the direct product of transcription?

• tRNA

• mRNA

• RNA

• DNA

Which type of molecule is the end product of the processes shown in the diagram?

• DNA

• RNA

• Protein

• Amino Acid

Tags

NGSS.HS-LS1-1

Where does Translation take place?

• Nucleus

• Mitochondria

• Ribosome

• Cytoplasm

A partial base sequence of a DNA molecule is shown below.

CAGCCATCA

What is the complementary base sequence of the DNA strand?

• GTCGCATCA

• GTCAACGGC

• GTCGGCAGC

• GTCGGTAGT

What 3 things make up DNA

• Sugar, phosphate, base

• Sugar, nitrogen, base

• Sugar, base, acid

• sugar, acid nitrogen

Which is NOT a difference between RNA and DNA?

• RNA is single stranded while DNA is double stranded

• RNA contains uracil while DNA contains Thymine

• DNA uses deoxyribose sugar while RNA uses Ribose

• All of these are corrent