Podcast
Questions and Answers
What is the role of H1 in DNA packaging in eukaryotes?
What is the role of H1 in DNA packaging in eukaryotes?
- Stabilizing both nucleosome structure and higher-order chromatin architecture (correct)
- Linking the histone cores with linker DNA
- Forming the histone octamer
- Compressing and folding the 300-nm fiber
During mitosis, what happens to the chromosomes?
During mitosis, what happens to the chromosomes?
- They wrap around the nucleosome twice
- They form looped domains
- They condense even further (correct)
- They become less condensed to allow for gene expression
How many H2A-H2B dimers and H3-H4 dimers form the histone octamer?
How many H2A-H2B dimers and H3-H4 dimers form the histone octamer?
- Two of each (correct)
- Four of each
- One of each
- Three of each
What is the purpose of the 30-nm chromatin fiber in DNA packaging?
What is the purpose of the 30-nm chromatin fiber in DNA packaging?
Which protein is not involved in the formation of the histone octamer?
Which protein is not involved in the formation of the histone octamer?
What is the function of linker DNA in DNA packaging?
What is the function of linker DNA in DNA packaging?
In DNA packaging to produce a chromatid of a chromosome, what process follows tight coiling of the 250-nm wide-fiber?
In DNA packaging to produce a chromatid of a chromosome, what process follows tight coiling of the 250-nm wide-fiber?
What type of nucleotide substitution occurs in mRNA compared to the coding strand?
What type of nucleotide substitution occurs in mRNA compared to the coding strand?
Which components form the spliceosome involved in splicing pre-mRNA?
Which components form the spliceosome involved in splicing pre-mRNA?
What is the function of the branch point nucleotide in the splicing process?
What is the function of the branch point nucleotide in the splicing process?
Where is the acceptor site located in the splicing process?
Where is the acceptor site located in the splicing process?
What happens when ribonucleoprotein complexes (snRNPs) bind to exon-intron junctions?
What happens when ribonucleoprotein complexes (snRNPs) bind to exon-intron junctions?
Which sequences are recognized by spliceosomes during splicing?
Which sequences are recognized by spliceosomes during splicing?
What is the role of spliceosomes in mRNA splicing?
What is the role of spliceosomes in mRNA splicing?
What is the role of Poly(A) polymerase enzyme in mRNA processing?
What is the role of Poly(A) polymerase enzyme in mRNA processing?
At what position downstream of the polyadenylation signal sequence does the endonuclease enzyme cleave the pre-mRNA strand?
At what position downstream of the polyadenylation signal sequence does the endonuclease enzyme cleave the pre-mRNA strand?
Which enzyme is responsible for cleaving the pre-mRNA strand?
Which enzyme is responsible for cleaving the pre-mRNA strand?
What is the function of the poly(A) tail added to mRNA?
What is the function of the poly(A) tail added to mRNA?
In what manner does Poly(A) polymerase add the poly(A) tail to pre-mRNA?
In what manner does Poly(A) polymerase add the poly(A) tail to pre-mRNA?
What is the size limit of the poly(A) tail added to pre-mRNA in mammalian cells?
What is the size limit of the poly(A) tail added to pre-mRNA in mammalian cells?
Which process described is crucial for tRNA to bind to the correct sequence of mRNA during translation?
Which process described is crucial for tRNA to bind to the correct sequence of mRNA during translation?
What is the role of the initiator tRNA in translation?
What is the role of the initiator tRNA in translation?
What distinguishes the start codon for polypeptide synthesis?
What distinguishes the start codon for polypeptide synthesis?
Which of the following is NOT a role of the anticodon loop?
Which of the following is NOT a role of the anticodon loop?
Why are base substitutions sometimes not changing an amino acid?
Why are base substitutions sometimes not changing an amino acid?
How is the termination of an amino acid chain signaled in translation?
How is the termination of an amino acid chain signaled in translation?
Where does the uncharged tRNA move after peptide bond formation?
Where does the uncharged tRNA move after peptide bond formation?
Which site on the ribosome does the empty tRNA move to after being released?
Which site on the ribosome does the empty tRNA move to after being released?
What is the term used to describe the many non-apoptotic ways for severely damaged or stressed animal cells to die?
What is the term used to describe the many non-apoptotic ways for severely damaged or stressed animal cells to die?
Which process ensures that damaged or infected cells are eliminated before they can threaten animal health?
Which process ensures that damaged or infected cells are eliminated before they can threaten animal health?
How are the two original portions of each chromosome rearranged during crossing-over?
How are the two original portions of each chromosome rearranged during crossing-over?
Which type of cell death is associated with loss of ion gradient and tissue damage across the membrane?
Which type of cell death is associated with loss of ion gradient and tissue damage across the membrane?
What is the primary cause of cell death through necrosis?
What is the primary cause of cell death through necrosis?
Which pathway involves an extracellular signal leading to cell death?
Which pathway involves an extracellular signal leading to cell death?
In which way do damaged or infected cells die to prevent a threat to animal health?
In which way do damaged or infected cells die to prevent a threat to animal health?
What type of cell death involves an intracellular signal, often from the mitochondria?
What type of cell death involves an intracellular signal, often from the mitochondria?
Which type of cell death is known for being a programmed process?
Which type of cell death is known for being a programmed process?
Flashcards are hidden until you start studying
