Biology
Grade-8
Easy
Question
In proteins, the α-helix and β-pleated sheet are examples of
- Primary structure
- Secondary structure
- Tertiary structure
- Quaternary structure
Hint:
Alpha-Helix and Beta-Pleated sheets are types of the secondary structure of the protein
The correct answer is: Secondary structure
- The alpha helix structure and the beta-pleated sheets contribute to the secondary structures that are held together by hydrogen bonds.
- The alpha helix has a right-handed spiral conformation. It is a polypeptide chain that is rod-shaped and coiled in a spring-like structure.
- Beta-pleated sheets are made of beta strands connected laterally by two or more hydrogen bonds. Each beta-strand is made up of 3 to 10 amino acid residues.
Related Questions to study
Biology
What does a promoter do?
What does a promoter do?
BiologyGrade-8
Biology
Which of the following are types of post-transcriptional control of genes in eukaryotes?
Which of the following are types of post-transcriptional control of genes in eukaryotes?
BiologyGrade-8
Biology
Which of the following helps to turn genes on so that they are expressed (transcribed and translated)?
Which of the following helps to turn genes on so that they are expressed (transcribed and translated)?
BiologyGrade-8
Biology
___ are DNA sequences that are often located far from the genes they regulate in eukaryotes where transcription activators can bind.
___ are DNA sequences that are often located far from the genes they regulate in eukaryotes where transcription activators can bind.
BiologyGrade-8
Biology
Eukaryotes need to regulate their genes
Eukaryotes need to regulate their genes
BiologyGrade-8
Biology
Negative control of gene expression is mediated by __ and results in a(n) __ in the frequency of transcription.
Negative control of gene expression is mediated by __ and results in a(n) __ in the frequency of transcription.
BiologyGrade-8
Biology
Most gene regulation happens at which step along the way.
Most gene regulation happens at which step along the way.
BiologyGrade-8
Biology
Genes can be shut off (not expressed) when a ___ binds to the ____.
Genes can be shut off (not expressed) when a ___ binds to the ____.
BiologyGrade-8
Biology
For a gene to be expressed, ___ must bind to the gene's ___, a specific sequence of nucleotides at one end of the gene, thus initiating transcription.
For a gene to be expressed, ___ must bind to the gene's ___, a specific sequence of nucleotides at one end of the gene, thus initiating transcription.
BiologyGrade-8
Biology
One way to regulate the expression of a gene is to control the formation of mRNA. This is called ___ control.
One way to regulate the expression of a gene is to control the formation of mRNA. This is called ___ control.
BiologyGrade-8
Biology
Prokaryotes regulate gene expression primarily
Prokaryotes regulate gene expression primarily
BiologyGrade-8
Biology
Which is not the nutrient in GM foods?
Which is not the nutrient in GM foods?
BiologyGrade-8
Biology
Food derived from GMOs is required to be tested for allergic reactions in humans.
Food derived from GMOs is required to be tested for allergic reactions in humans.
BiologyGrade-8
Biology
Which is not the characteristic of a transgenic crop?
Which is not the characteristic of a transgenic crop?
BiologyGrade-8
Biology
When was the first genetically modified plant produced in a laboratory?
When was the first genetically modified plant produced in a laboratory?
BiologyGrade-8
