Mr Eddy's first try at Quizizz

What is a promoter?

• Sequence of DNA at the beginning of the gene that tells RNA polymerase where to start transcription.

• Sequence of RNA that tells the ribosome where to start translation.

• Sequence of DNA at the beginning of the gene that tells the ribosome where to start transcription

• Sequence of RNA that tells RNA polymerase where to start translation.

In RNA, Uracil pairs with ______. 

• cytosine
• adenine
• guanine
• thymine

The image shows part of a polypeptide. What determines the order in which the amino acids are connected to each other in the polypeptide?

• the chemical structure of each R-group in the amino acid

• the order of the the nitrogenous bases in a gene

• the random nature of ribosome function

• the sequence of amino acids that make up the gene

Which of the following does not occur in prokaryotic gene expression but does occur in eukaryotic gene expression?

• mRNA, tRNA, and rRNA are transcribed
• RNA polymerase binds to the promotor
• a poly-A tail is added to the ends of the mRNA
• Transcription can begin as soon as translation has begun even alittle

What is the function of the poly-A tail in mRNA?

• to add modified guanin to the 3' end of the mRNA
• to indicate the site of translational termination
• to code for the binding of RNA polymerase to the DNA
• to help protect the mRNA from degradation by hydrolytic enzymes 

What is the location in the cell for translation?

• nucleus
• mitochondria
• ribosome
• chloroplast

A certain gene codes for a polypeptide that is 120 amino acids long. Approximately how many nucleotides long is the mRNA that codes for this polypeptide likely to be?

• 360
• 480
• 40
• 30

The genetic code is essentially the same for all organisms. From this, one can logically assume which of the following?

• The same codons in different organisms translate into the different amino acids.
• A gene from an organism can theoretically be expressed by any other organism.
• All organisms have experienced convergent evolution.
• DNA was the first genetic material.

The lac operon genes only become expressed if:

• lactose binds to the repressor
• glucose binds to the repressor
• lactose binds to the operator
• the repressor binds to the operator

Operons are found in the cells of which of the following types of organisms?

• prokaryotes (bacteria)
• eukaryotes (plant and animals)
• animals only
• viruses