Pepsin acts on denatured proteins to produce (A) Proteoses and peptones (B) Polypeptides (C) Peptides (D) Dipeptides

Pepsin acts on denatured proteins to produce (A) Proteoses and peptones (B) Polypeptides (C) Peptides (D) Dipeptides
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If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen? (a) The pancreatic enzymes and specially the trypsin and lipase will not work efficiently. (b) The pH of stomach will fall abruptly. (c) Steapsin will be more effective. (d) Proteins will not be adequately hydrolysed by pepsin into proteoses and peptones.

Description : If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen? (a) The pancreatic enzymes and specially the trypsin and lipase will ... more effective. (d) Proteins will not be adequately hydrolysed by pepsin into proteoses and peptones.

Last Answer : (d) Proteins will not be adequately hydrolysed by pepsin into proteoses and peptones.

Which of the following converts peptones, proteoses and polypeptides into amino acids : (a) Amylase (b) Trypsin (c) Lipase (d) Rennin

Description : Which of the following converts peptones, proteoses and polypeptides into amino acids : (a) Amylase (b) Trypsin (c) Lipase (d) Rennin

Last Answer : (b) Trypsin

What role does enzyme pepsin play? (1) It converts fats into acids (2) If converts fats into glycerol (3) It converts proteins into peptones (4) It converts starch into sugar

Description : What role does enzyme pepsin play? (1) It converts fats into acids (2) If converts fats into glycerol (3) It converts proteins into peptones (4) It converts starch into sugar

Last Answer : (3) It converts proteins into peptones Explanation: Pepsin is an endopeptidase that breaks down proteins into peptone and polypeptides. If is produced in the stomach and is one of the main digestive enzymes.

Which statement is NOT true about non-steroid (peptide) hormones? A) They are derived from peptides, proteins, polypeptides, and derivatives of amino acids. B) They bind to receptors on the cell surface. C) They form cyclic AMP inside the cell. D) They create an enzyme cascade effect. E) They enter the cell in order to have an effect.

Description : Which statement is NOT true about non-steroid (peptide) hormones? A) They are derived from peptides, proteins, polypeptides, and derivatives of amino acids. B) They bind to receptors on the cell surface. ... They create an enzyme cascade effect. E) They enter the cell in order to have an effect.

Last Answer : E) They enter the cell in order to have an effect.

Proteins produce polypeptides from proteins by (A) Oxidizing (B) Reducing (C) Hydrolyzing (D) None of these

Description : Proteins produce polypeptides from proteins by (A) Oxidizing (B) Reducing (C) Hydrolyzing (D) None of these

Last Answer : Answer : C

All following are conjugated proteins except (A) Nucleoproteins (B) Proteoses (C) Metalloproteins (D) Flavoproteins

Description : All following are conjugated proteins except (A) Nucleoproteins (B) Proteoses (C) Metalloproteins (D) Flavoproteins

Last Answer : Answer : B

The enzyme enterokinase helps in conversion of (a) protein into polypeptides (b) trypsinogen into trypsin (c) caseinogen into casein (d) pepsinogen into pepsin.

Description : The enzyme enterokinase helps in conversion of (a) protein into polypeptides (b) trypsinogen into trypsin (c) caseinogen into casein (d) pepsinogen into pepsin.

Last Answer : (b) trypsinogen into trypsin

The digestability of certain denatured proteins by proteolytic enzymes (A) Decreases (B) Increases (C) Normal (D) None of these

Description : The digestability of certain denatured proteins by proteolytic enzymes (A) Decreases (B) Increases (C) Normal (D) None of these

Last Answer : Answer : A

Polymers of more than 100 amino acids are termed (A) Proteins (B) Polypeptides (C) Both (A) and (B) (D) None of these

Description : Polymers of more than 100 amino acids are termed (A) Proteins (B) Polypeptides (C) Both (A) and (B) (D) None of these

Last Answer : Answer : A

Three of the following statements about enzymes are correct and one is wrong. Which one is wrong? (a) Enzymes require optimum pH for maximal activity. (b) Enzymes are denatured at high temperature but in certain exceptional organisms they are effective even at temperatures 80° - 90°C. (c) Enzymes are highly specific. (d) Most enzymes are proteins but some are lipids.

Description : Three of the following statements about enzymes are correct and one is wrong. Which one is wrong? (a) Enzymes require optimum pH for maximal activity. (b) Enzymes are denatured at high temperature but ... - 90°C. (c) Enzymes are highly specific. (d) Most enzymes are proteins but some are lipids.

Last Answer : (d) Most enzymes are proteins but some are lipids.

Which of the following statements about enzymes is wrong? (a) Enzymes are denatured at high temperatures. (b) Enzymes are mostly proteins but some are lipids also. (c) Enzymes are highly specific. (d) Enzymes require optimum pH and temperature for maximum activity

Description : Which of the following statements about enzymes is wrong? (a) Enzymes are denatured at high temperatures. (b) Enzymes are mostly proteins but some are lipids also. (c) Enzymes are highly specific. (d) Enzymes require optimum pH and temperature for maximum activity

Last Answer : (b) Enzymes are mostly proteins but some are lipids also.

Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand

Description : Stem and loop structures are A- proteins that help partially denatured enzymes to recover their native configuration B- structures in DNA caused by inverted repeats C- structures at the ends of linear eukaryotic DNA molecules D- the bonds between adjacent DNA nucleotides in the same strand

Last Answer : structures in DNA caused by inverted repeats

Why are proteins called polypeptides? -Biology

Description : Why are proteins called polypeptides? -Biology

Last Answer : answer:

All the following statements about pepsin are correct except (A) It is smaller than pepsinogen (B) It is formed by the action of HCl on its precursor (C) Its optimum pH is 1.0–2.0 (D) It hydrolyses the C-terminal and N-terminal peptide bonds of proteins

Description : All the following statements about pepsin are correct except (A) It is smaller than pepsinogen (B) It is formed by the action of HCl on its precursor (C) Its optimum pH is 1.0–2.0 (D) It hydrolyses the C-terminal and N-terminal peptide bonds of proteins

Last Answer : Answer : D

Which of the following statement(s) is/are true concerning cellular ion channels? a. Ion channels are transmembrane proteins that form pores that can conduct ions across the plasma membrane b. Ion channels are formed by membrane-spanning peptides that are arranged so that polar moieties line a central core c. Ion channel proteins undergo conformational changes between open states and closed states d. Ion channels can be blocked

Description : Which of the following statement(s) is/are true concerning cellular ion channels? a. Ion channels are transmembrane proteins that form pores that can conduct ions across the plasma membrane b. ... undergo conformational changes between open states and closed states d. Ion channels can be blocked

Last Answer : Answer: a, b, c, d Ion channels are transmembrane proteins that form pores that can conduct ions across the plasma membrane. Ion channels are formed by membrane-spanning peptides that are arranged ... be blocked by ions or organic compounds that enter the channel, bind there, and occlude the pore

Which statement about hormone types is correct? A) Non-steroid hormones activate an enzyme cascade. B) Steroid hormones regulate the production of a particular protein. C) Non-steroid hormones are either amino acids, peptides, or proteins. D) Steroid hormones all have four carbon rings with different side chains. E) All of the choices are correct.

Description : Which statement about hormone types is correct? A) Non-steroid hormones activate an enzyme cascade. B) Steroid hormones regulate the production of a particular protein. C) Non-steroid hormones are ... all have four carbon rings with different side chains. E) All of the choices are correct.

Last Answer : E) All of the choices are correct.

Hormones are composed from many classes of molecules. As far as our present knowledge extends, hormones are NOT found in which of the following categories of substances: a) proteins b) peptides c) nucleic acids d) steroids

Description : Hormones are composed from many classes of molecules. As far as our present knowledge extends, hormones are NOT found in which of the following categories of substances: a) proteins b) peptides c) nucleic acids d) steroids

Last Answer : ANSWER: C -- NUCLEIC ACIDS 

What is the theoretical number of chemically different dipeptides that may be assembled from 2 amino acids?

Description : What is the theoretical number of chemically different dipeptides that may be assembled from 2 amino acids?

Last Answer : 4n^2Where n is the no. of amino acids assembled and 2 is the no. amino acids present in the dipeptide.Hence, 2^2=4 dipeptides formed

DNA po lymerase of T. aquat icus is preferred to that of E. coli in PCR because (A) It replicates DNA more efficiently (B) It doesn’t require primers (C) It is not denatured at the melting temperature of DNA (D) It doesn’t cause errors in replication

Description : DNA po lymerase of T. aquat icus is preferred to that of E. coli in PCR because (A) It replicates DNA more efficiently (B) It doesn’t require primers (C) It is not denatured at the melting temperature of DNA (D) It doesn’t cause errors in replication

Last Answer : Answer : C

Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Description : Melting temperature of DNA is the temperature at which (A) Solid DNA becomes liquid (B) Liquid DNA evaporates (C) DNA changes from double helix into supercoiled DNA (D) Native double helical DNA is denatured

Last Answer : Answer : D

A mRNA of eukaryotes can code for (A) Only one polypeptide (B) Two polypeptides (C) Three polypeptides (D) Five polypeptides

Description : A mRNA of eukaryotes can code for (A) Only one polypeptide (B) Two polypeptides (C) Three polypeptides (D) Five polypeptides

Last Answer : Answer : A

Enzyme pepsin acts in `:`

Description : Enzyme pepsin acts in `:`

Last Answer : Enzyme pepsin acts in `:` A. acidic medium in the pancreas B. acidic medium in the stomach C. intestine D. mouth

Gastric enzyme pepsin acts only in acidic medium with in a limited pH concentration. It varies `:`

Description : Gastric enzyme pepsin acts only in acidic medium with in a limited pH concentration. It varies `:`

Last Answer : Gastric enzyme pepsin acts only in acidic medium with in a limited pH concentration. It varies `:` A. 1.20 to 1.80 ... C. 2.00 to 2.50 D. 1.50 to 2.60

Enzyme pepsin acts upon food at a pH of about `:-`

Description : Enzyme pepsin acts upon food at a pH of about `:-`

Last Answer : Enzyme pepsin acts upon food at a pH of about `:-` A. 3 to split proteins B. 2 to ... protein into peptones D. 2 to change protein in amino acids

Pepsin acts on : (a) Protein (b) Lipid (c) Carbohydrate (d) All these

Description : Pepsin acts on : (a) Protein (b) Lipid (c) Carbohydrate (d) All these

Last Answer : (a) Protein

Which of the following reunites the exon segments after RNA splicing? (a) RNA polymerase (b) RNA primase (c) RNA ligase (d) RNA proteoses

Description : Which of the following reunites the exon segments after RNA splicing? (a) RNA polymerase (b) RNA primase (c) RNA ligase (d) RNA proteoses

Last Answer : (c) RNA ligase

Pepsin digests _______. (1) proteins in stomach (2) carbohydrates in mouth (3) fats in duodenum (4) minerals in ileum

Description : Pepsin digests _______. (1) proteins in stomach (2) carbohydrates in mouth (3) fats in duodenum (4) minerals in ileum

Last Answer : (1) proteins in stomach Explanation: Pepsin is produced in the stomach and is one of the main digestive enzymes in the digestive systems of humans and many other animals, where it helps digest the proteins in food.

Which enzyme digests proteins in the stomach? (1) Trypsin (2) Pepsin (3) Salivary amylase (4) Pancreatic canal

Description : Which enzyme digests proteins in the stomach? (1) Trypsin (2) Pepsin (3) Salivary amylase (4) Pancreatic canal

Last Answer : (2) Pepsin Explanation: Protein digestion begins in the stomach with the action of pepsin. Pepsin is the active protein-digesting enzyme of the stomach. When pepsin acts on the protein ... that are digested in the small intestine with the help of trypsin, chymotrypsin, and carboxypeptidase.

Which enzyme converts proteins? (1) Pepsin (2) Trypsin (3) Erepsin (4) Enterokinase

Description : Which enzyme converts proteins? (1) Pepsin (2) Trypsin (3) Erepsin (4) Enterokinase

Last Answer : (2) Trypsin Explanation: Trypsin is a serine protease found in the digestive system of many vertebrates, where it hydrolyses proteins. Trypsin in the duodenum catalyses the hydrolysis of peptide ... then be further hydrolyzed into amino acids by other proteases before they enter the blood stream.

Which one of the following pairs of chemical substances, is correctly categorised? (a) Calcitonin and thymosin - Thyroid hormones (b) Pepsin and prolactin - Two digestive enzymes secreted in stomach (c) Troponin and myosin - Complex proteins in striated muscles (d) Secretin and rhodopsin - Polypeptide hormones

Description : Which one of the following pairs of chemical substances, is correctly categorised? (a) Calcitonin and thymosin - Thyroid hormones (b) Pepsin and prolactin - Two digestive enzymes secreted in ... and myosin - Complex proteins in striated muscles (d) Secretin and rhodopsin - Polypeptide hormones

Last Answer : (c) Troponin and myosin - Complex proteins in striated muscles

Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product? (a) Small intestine : Proteins Pepsin  →  Amino acids (b) Stomach : Fats Lipase  →  Micelles (c) Duodenum : Triglycerides Trypsin  →  Monoglycerides (d) Small intestine : Starch α-Amylase  →  Disaccharide (maltose)

Description : Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product? (a) Small intestine : Proteins Pepsin  →  ... Trypsin  →  Monoglycerides (d) Small intestine : Starch α-Amylase  →  Disaccharide (maltose)

Last Answer : (d) Small intestine : Starch α-Amylase  →  Disaccharide

Which enzyme digests proteins in the stomach? (1) Trypsin (2) Pepsin (3) Salivary amylase (4) Pancreatic canal

Description : Which enzyme digests proteins in the stomach? (1) Trypsin (2) Pepsin (3) Salivary amylase (4) Pancreatic canal

Last Answer : Pepsin

Translocase is an enzyme required in the process of (A) DNA replication (B) RNA synthesis (C) Initiation of protein synthesis (D) Elongation of peptides

Description : Translocase is an enzyme required in the process of (A) DNA replication (B) RNA synthesis (C) Initiation of protein synthesis (D) Elongation of peptides

Last Answer : Answer : D

Tetracylin prevents synthesis of polypeptide by (A) Blocking mRNA formation from DNA (B) Releasing peptides from mRNA-tRNA complex (C) Competing with mRNA for ribosomal binding sites (D) Preventing binding of aminoacyl tRNA

Description : Tetracylin prevents synthesis of polypeptide by (A) Blocking mRNA formation from DNA (B) Releasing peptides from mRNA-tRNA complex (C) Competing with mRNA for ribosomal binding sites (D) Preventing binding of aminoacyl tRNA

Last Answer : Answer : D

Carboxy peptidase B in the small intestine hydrolyzes peptides containing (A) Leucine (B) Isoleucine (C) Arginine (D) Cysteine

Description : Carboxy peptidase B in the small intestine hydrolyzes peptides containing (A) Leucine (B) Isoleucine (C) Arginine (D) Cysteine

Last Answer : Answer : C

If the stomach did not produce any hydrochloric acid, which enzyme will not function? (1) Ptyalin (2) Rennin (3) Pepsin (4) Lipase

Description : If the stomach did not produce any hydrochloric acid, which enzyme will not function? (1) Ptyalin (2) Rennin (3) Pepsin (4) Lipase

Last Answer : (3) Pepsin Explanation: Hydrochloric acid converts pepsinogen into an enzyme called pepsin. When food enters the stomach, hydrochloric acid production increases and the pH may fall to as low as 1 or 2, a very acidic condition.

Would you expect the denatured DNA to regain its transforming capacity when cooled?

Description : Would you expect the denatured DNA to regain its transforming capacity when cooled?

Last Answer : This sounds like a homework question.

Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing? -Do You Know?

Description : Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing? -Do You Know?

Last Answer : answer:

Denatured alcohol 1. Is an impure form of ethanol 2. Is unfit for drinking as it contains poisonous substances 3. Contains impurities 4. Is very unsafe to consume The correct answers are: (a) 1, 2 and 4 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 3

Description : Denatured alcohol 1. Is an impure form of ethanol 2. Is unfit for drinking as it contains poisonous substances 3. Contains impurities 4. Is very unsafe to consume The correct answers are: (a) 1, 2 and 4 (b) 1, 2, 3 and 4 (c) 2, 3 and 4 (d) 1, 2 and 3

Last Answer : Ans:(b)

Ethanol containing 5% water is known as – (1) rectified spirit (2) denatured spirit (3) methylated alcohol (4) power alcohol

Description : Ethanol containing 5% water is known as – (1) rectified spirit (2) denatured spirit (3) methylated alcohol (4) power alcohol

Last Answer : (1) rectified spirit Explanation: A rectified spirit, rectified alcohol, or neutral spirit is highly concentrated ethanol which has been purified by means of repeated distillation, a process that is ... drinks, in the production of liqueurs, for medicinal purposes, and as a household solvent.

Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing?

Description : Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing?

Last Answer : Pyridine

With regard to DNA molecules: a. they contain adenine, cytosine, guanine and uracil bases b. they can be detected with Western blotting c. they can be detected with Southern blotting d. they are denatured at temperature of 1000C

Description : With regard to DNA molecules: a. they contain adenine, cytosine, guanine and uracil bases b. they can be detected with Western blotting c. they can be detected with Southern blotting d. they are denatured at temperature of 1000C

Last Answer : they can be detected with Southern blotting

Methanol is known as : (a) Rubbing alcohol (b) Grain alcohol (c) Wood alcohol (d) Denatured alcohol

Description : Methanol is known as : (a) Rubbing alcohol (b) Grain alcohol (c) Wood alcohol (d) Denatured alcohol

Last Answer : Wood alcohol

1. Besides water and light which is more essential as a raw material for photosynthesis? 2. Which can impose reasonable restrictions on the Fundamental Rights of the Indian citizens? 3. Denatured spirit is a mixture of ethyl alcohol, methyl alcohol and which other thing? 4. What is the administrative capital of South Africa? 5. During the 1857 Revolt who captured Gwalior from the Scindhia ?

Description : 1. Besides water and light which is more essential as a raw material for photosynthesis? 2. Which can impose reasonable restrictions on the Fundamental Rights of the Indian citizens? 3. Denatured ... portion remaining above the sea level? 20. At which place is the famous Kailasha Temple located?

Last Answer : Answer : 1. CO2 2. Parliament 3. Pyridine 4. Pretoria 5. Rani Lakshmibai 6. Rabindranath Tagore 7. Profession Tax 8. Due to imbibition 9. Myanmar 10. Dandi March 11. 44th 12. Because of ... Young folded mountains 15. Lord Mountbatten 16. Deolali 17. Phototropism 18. 500 19. 1/10th 20. Ellora

Ethanol containing 5% water is known as (1) rectified spirit (2) denatured spirit (3) methylated alcohol (4) power alcohol

Description : Ethanol containing 5% water is known as (1) rectified spirit (2) denatured spirit (3) methylated alcohol (4) power alcohol 

Last Answer : rectified spirit

Denatured spirit is ethanol mixed with (1) Petrol (2) Kerosene (3) Water (4) Pyridine

Description : Denatured spirit is ethanol mixed with (1) Petrol (2) Kerosene (3) Water (4) Pyridine 

Last Answer : Pyridine

What type of RNA makes up the ribosomes that manufacture polypeptides?

Description : What type of RNA makes up the ribosomes that manufacture polypeptides?

Last Answer : Feel Free to Answer

Cytokines are low-molecular-weight polypeptides exerting a wide variety of biologic effects at both local and systemic levels. Which of the following statement(s) is/are true concerning the production and actions of cytokines? a. Cytokines are produced solely by macrophages b. Cytokines act only on other cells within the same local environment c. Cytokines may have both protective and deleterious effects on the host d. Each specific cytokine is produced by a single cell type

Description : Cytokines are low-molecular-weight polypeptides exerting a wide variety of biologic effects at both local and systemic levels. Which of the following statement(s) is/are true concerning the production and ... effects on the host d. Each specific cytokine is produced by a single cell type

Last Answer : Answer: c Macrophages, endothelial cells, lymphocytes, and other cells secrete a large number of different compounds, termed cytokines, that are most probably evolved for the purpose of ... host defenses, exerting both salutatory and deleterious effects on the host, has become increasingly evident

The major constituents in agar are a. Fats b. Aminoacids c. Polysaccharides d. Polypeptides

Description : The major constituents in agar are a. Fats b. Aminoacids c. Polysaccharides d. Polypeptides

Last Answer : Ans: C

The two polypeptides of human insulin are linked together by (a) covalent bond (b) disulphide bridges (c) hydrogen bonds (d) phosphodiester bond.

Description : The two polypeptides of human insulin are linked together by (a) covalent bond (b) disulphide bridges (c) hydrogen bonds (d) phosphodiester bond.

Last Answer : (b) disulphide bridges