Review PROTEIN SYNTHESIS

Which of the following are differences in the structure between RNA and DNA

• DNA uses deoxyribose sugar, RNA uses sugar ribose

• DNA pairs Adenine with Uracil, RNA pairs Adenine with Thymine

• DNA is a double helix, RNA is a single strand

• DNA pairs Adenine with Thymine, RNA pairs Adenine with Uracil

The picture represents DNA replication, transcription, or translation?

• DNA replication

• Transcription

• Translation

The picture represents DNA replication, transcription, or translation?

• DNA replication

• Transcription

• Translation

The picture represents DNA replication, transcription, or translation?

• DNA replication

• Transcription

• Translation

The backbone of a DNA molecule is made of _____ and _____.

• 
• 
• 

Tags

NGSS.HS-LS1-1

​ (a)   binds the nitrogen bases between the two strands of DNA.

• Hydrogen bond (H-bond)
• Phosphodiester bonds
• Glycoside bond

Answer explanation

There are three types of bond present in DNA:

Phosphodiester bonds exist between the nucleotides,

Hydrogen bond exists between the nitrogenous base,

Glycoside bond exists between the pentose sugar molecule and nitrogenous base.

Tags

NGSS.HS-LS1-1

How many nucleotides make up an amino acid?

• 1

• 2

• 3

• 4

Answer explanation

Each group of three nucleotides (codon) encodes one amino acid.

In DNA, Adenine always pairs with ​ (a)   and Guanine always pairs with ​ (b)   .

• Thymine
• Cytosine
• Uracil
• Guanine
• Adenine

Answer explanation

In DNA, adenine always pairs with thymine (A-T), and guanine always pairs with cytosine (G-C).

In RNA, Adenine always pairs with ​ (a)   (A-U) and ​ (b)   always pairs with Cytosine.

• Uracil
• Guanine
• Adenine
• Cytosine
• Thymine

Answer explanation

In RNA adenine always pairs with uracil (A-U).

Where in the cell does translation take place?

• in the nucleus

• on ribosomes in the cell cytoplasm

• in the cytoplasm and mitochondria

• in the chloroplast

Answer explanation

Translation takes place on ribosomes in the cell cytoplasm, where mRNA is read and translated into the string of amino acid chains that make up the synthesized protein.