Which statement is true about proteins?
Proteins are the building blocks of life, which are composed of amino acids, arranged into different groups. These proteins are essential biomolecules, which are involved in the maintenance and metabolic processes of living organisms. 1.
Are proteins hydrophobic or hydrophilic?
The interior and the exterior of cells is liquid, usually a solution or suspension of ions, small molecules and large molecules dissolved in water. Proteins must therefore be hydrophilic (“water loving”) in order to be suspended in this environment.
Are proteins composed of amino acids?
What Are Proteins Made Of? The building blocks of proteins are amino acids, which are small organic molecules that consist of an alpha (central) carbon atom linked to an amino group, a carboxyl group, a hydrogen atom, and a variable component called a side chain (see below).
Which of the following is a characteristic of proteins?
Important functional characteristics of proteins include their glass transition temperature, melting point, isoelectric point, molecular weight, secondary structure, solubility, surface hydrophobicity and emulsification . These characteristics will establish their viability and best use in the food industry.
Why does protein folding happen?
Protein folding occurs in a cellular compartment called the endoplasmic reticulum. This is a vital cellular process because proteins must be correctly folded into specific, three-dimensional shapes in order to function correctly. Unfolded or misfolded proteins contribute to the pathology of many diseases.
Why are proteins hydrophobic?
Structures of water-soluble proteins have a hydrophobic core in which side chains are buried from water, which stabilizes the folded state. Charged and polar side chains are situated on the solvent-exposed surface where they interact with surrounding water molecules.
Which of the following is not protein?
Wool, hair and nail are proteins and cellulose is not a protein.
When a protein is heated Which of the following will most likely be disrupted?
Heating a protein will not change its primary structure, but may change its secondary, tertiary or quaternary structure.
Which of the following is not the function of proteins?
Glucose does not contain amino acids whereas proteins contain amino acids. Thus, the energy provider is not a function of proteins. Hence, the correct option is the option (D) As energy provider for metabolism.
Which of the following is not a protein denaturant?
Which of the following cannot denature a protein? Explanation: Iodoacetic acid, an alkylating agent cannot denature the protein.
Which of the following is not a conjugated protein?
Peptone is any group of soluble and diffusable derived proteins formed by the action of enzymes on proteins, as in the process of digestion or by acid hydrolysis. All other are conujugated proteins.
Which of the following is a protein?
Solution(By Examveda Team)
Natural rubber is a protein.
Which of the statements is false about multiple sequence alignment?
4. Which of the statements is false about multiple sequence alignment? Explanation: Less useful in RNA. This is because base pairing is highly conserved than sequence.
Which level of protein structure is not present in all proteins?
Not all proteins have a quaternary level of structure.
Which of the following is not true about secondary protein structure?
2. Which of the following is not true about secondary protein structure? Explanation: The hydrophilic/hydrophobic character of amino acid residues is important to protein tertiary structure rather than to secondary structure. … Explanation: Secondary structure of proteins is of two forms α-helix and β-pleated structures.
Which of the following is untrue about protein substitution matrices?
6. Which of the following is untrue about Protein substitution matrices? Explanation: Protein substitution matrices are significantly more complex than DNA scoring matrices. Proteins are composed of twenty amino acids, and physico-chemical properties of individual amino acids vary considerably.
Which of the following is untrue about clustal program?
5. Which of the following is untrue about CLUSTAL program? Explanation: The initial heuristic alignment obtained by MSA is calculated the same way, although it performs a global-multiple sequence alignment by a different method than MSA (Multiple Sequence Alignment).
Which of the following is a protein sequence database?
The leading universal curated protein sequence database is Swiss-Prot (http://www.ebi.ac.uk/swissprot/index.html), which contained as of November 2003 (release 42.6) 140 000 curated sequence entries from over 8300 different species.