Which of the following is a true statement?

Multiple Choices:
A. Which proteins a cell makes is determined by which genes are activated in that cell.
B. Different cells make different proteins because they contain different genes.
C. Only activated proteins combine to form mRNA molecules during protein synthesis.
D. All genes in all cells are activated during protein synthesis.

This figure illustrates the mechanism of alternative splicing. What is its result?

Multiple Choices:
A. A single tRNA can produce hundreds of proteins.
B. One protein can be produced by many genes.
C. One gene can code for more than one protein.
D. Histones can link several DNA chains together

Which term refers to a sequence of three DNA nucleotides that codes for one amino acid?

Multiple Choices:
A. Anticodon
B. Proteome
C. Base triplet
D. Codon

Fill in the blanks — Following transcription, only some portions of the mRNA code for the final protein. The sections of mRNA that contain necessary code are called ______, whereas the mRNA sections that do not code for the final protein are called ______.

Question:
Which of the following statements about codons are true? (Select all that apply.)

Options:
A. A codon is a three-base sequence of tRNA.
B. Every codon codes for an amino acid.
C. The genetic code is expressed as a sequence of codons.
D. A codon is a three-base sequence of mRNA.

Fill in the blank — The enzyme that binds to the DNA and assembles the RNA is called RNA ______.

Question:
Where does transcription take place?

Multiple Choices:
A. On ribosomes
B. In the nucleus
C. In the Golgi apparatus
D. In mitochondria

Question:
Where does transcription take place?

Multiple Choices:
A. On ribosomes
B. In the nucleus
C. In the Golgi apparatus
D. In mitochondria

Question:
Where does the making of mRNA from DNA take place?

Multiple Choices:
A. On ribosomes
B. On rough ER
C. In vesicles
D. In the nucleus

A gene is a segment of ______.

Multiple Choices:
A. Protein
B. RNA
C. DNA