185337
Assertion (A) : Enzymes are inactivated at low temperature Reason (R) : Temperature changes the structure of the substrate The correct option among the following is
1 (A) and (R) are true, (R) is the correct explanation for \((\mathrm{A})\)
2 (A) and (R) are true, but (R) is not the correct explanation for \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
Explanation:
Exp: C (A) is true but (R) is false. - Enzymes are inactivated at low temperature. At low temperatures, the number of successful collisions between the enzyme and substrate in reduced because their molecular movement decreases. The reaction is slow. - Temperature does not change the structure of the substrate. Hence, c one is the correct answer.
Shift-II
Biomolecules
185338
Which of the following statements are true regarding lipids? a) Glycerol is a simple lipid trihydroxy propane. b) In triglycerides fatty acid is esterified with glycerol. c) The melting point of oils is higher than that of fats. d) Saturated fatty acids do not have double bonds
1 abd
2 abc
3 acd
4 bcd
Explanation:
Exp: A Among the following statements (a) is true. Glycerol is a simple lipid that is made up of three hydroxyl groups \((-\mathrm{OH})\) bonded to a carbon skeleton. Because of the presence of three hydroxyl groups, it is called trihydroxy. Propane is a three-carbon alkane with the molecular formula \(\mathrm{C}_{3} \mathrm{H}_{8}\). When three hydrogen atoms of propane are replaced by three hydroxyl groups, this gives rise to a molecule of glycerol. Statement (b) is also true. In triglycerides, three fatty acids are esterifies to glycerol. - Statement (c) is false. The melting point of oils is lower than that of fats. Oils are liquid at room temperature, while fats are solid. This is because oils have more double bonds in their fatty acids, which makes them less saturated. - Statement (d) is true. Saturated fatty acids do not have double bonds. The saturated fatty acids are stable and are short chain fatty acids. When the hydrogen reacts with the unsaturated fatty acid, all the double bonds are converted into the single bonds.
Shift-II
Biomolecules
185354
Given below is the chemical formula of
1 palmitic acid
2 glycerol
3 galactose
4 stearic acid
Explanation:
Exp: A The given chemical formula is of palmitic acid. It is the most common saturated fatty acid found in animals, plant and microorganisms. Its chemical formula is \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{14} \mathrm{COOH}\) and is represented as :
JIPMER-2014
Biomolecules
185344
Which one among the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
1 Adenine, Thymine - Purines
2 Guanine, Adenine - Purines
3 Uracil, Cytosine - Pyrimidines
4 Thymine, Uracil - Pyrimidines
Explanation:
Exp: A There are 5 types of nitrogenous bases, categorized under purines and pyrimidines. The purine contains bases are Adenine and Guanine while pyrimidine contains Cytosine, Thymine and Uracil. Adenine, Guanine, Cytosine and Thymine are found in DNA while Thymine is replaced by Uracil in RNA.
JCECE-2018
Biomolecules
185346
Which one of the following biomolecules is synthesized in smooth endoplasmic reticulum
1 Proteins
2 Lipids
3 Carbohydrates
4 Nucleotides
Explanation:
Exp: B Lipid molecules in the cell are synthesized by the smooth endoplasmic reticulum. The rough endoplasmic reticulum synthesizes proteins. Golgi apparatus synthesizes complex sugars and plastids are involved in the synthesis of carbohydrates through photosynthesis.
185337
Assertion (A) : Enzymes are inactivated at low temperature Reason (R) : Temperature changes the structure of the substrate The correct option among the following is
1 (A) and (R) are true, (R) is the correct explanation for \((\mathrm{A})\)
2 (A) and (R) are true, but (R) is not the correct explanation for \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
Explanation:
Exp: C (A) is true but (R) is false. - Enzymes are inactivated at low temperature. At low temperatures, the number of successful collisions between the enzyme and substrate in reduced because their molecular movement decreases. The reaction is slow. - Temperature does not change the structure of the substrate. Hence, c one is the correct answer.
Shift-II
Biomolecules
185338
Which of the following statements are true regarding lipids? a) Glycerol is a simple lipid trihydroxy propane. b) In triglycerides fatty acid is esterified with glycerol. c) The melting point of oils is higher than that of fats. d) Saturated fatty acids do not have double bonds
1 abd
2 abc
3 acd
4 bcd
Explanation:
Exp: A Among the following statements (a) is true. Glycerol is a simple lipid that is made up of three hydroxyl groups \((-\mathrm{OH})\) bonded to a carbon skeleton. Because of the presence of three hydroxyl groups, it is called trihydroxy. Propane is a three-carbon alkane with the molecular formula \(\mathrm{C}_{3} \mathrm{H}_{8}\). When three hydrogen atoms of propane are replaced by three hydroxyl groups, this gives rise to a molecule of glycerol. Statement (b) is also true. In triglycerides, three fatty acids are esterifies to glycerol. - Statement (c) is false. The melting point of oils is lower than that of fats. Oils are liquid at room temperature, while fats are solid. This is because oils have more double bonds in their fatty acids, which makes them less saturated. - Statement (d) is true. Saturated fatty acids do not have double bonds. The saturated fatty acids are stable and are short chain fatty acids. When the hydrogen reacts with the unsaturated fatty acid, all the double bonds are converted into the single bonds.
Shift-II
Biomolecules
185354
Given below is the chemical formula of
1 palmitic acid
2 glycerol
3 galactose
4 stearic acid
Explanation:
Exp: A The given chemical formula is of palmitic acid. It is the most common saturated fatty acid found in animals, plant and microorganisms. Its chemical formula is \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{14} \mathrm{COOH}\) and is represented as :
JIPMER-2014
Biomolecules
185344
Which one among the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
1 Adenine, Thymine - Purines
2 Guanine, Adenine - Purines
3 Uracil, Cytosine - Pyrimidines
4 Thymine, Uracil - Pyrimidines
Explanation:
Exp: A There are 5 types of nitrogenous bases, categorized under purines and pyrimidines. The purine contains bases are Adenine and Guanine while pyrimidine contains Cytosine, Thymine and Uracil. Adenine, Guanine, Cytosine and Thymine are found in DNA while Thymine is replaced by Uracil in RNA.
JCECE-2018
Biomolecules
185346
Which one of the following biomolecules is synthesized in smooth endoplasmic reticulum
1 Proteins
2 Lipids
3 Carbohydrates
4 Nucleotides
Explanation:
Exp: B Lipid molecules in the cell are synthesized by the smooth endoplasmic reticulum. The rough endoplasmic reticulum synthesizes proteins. Golgi apparatus synthesizes complex sugars and plastids are involved in the synthesis of carbohydrates through photosynthesis.
185337
Assertion (A) : Enzymes are inactivated at low temperature Reason (R) : Temperature changes the structure of the substrate The correct option among the following is
1 (A) and (R) are true, (R) is the correct explanation for \((\mathrm{A})\)
2 (A) and (R) are true, but (R) is not the correct explanation for \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
Explanation:
Exp: C (A) is true but (R) is false. - Enzymes are inactivated at low temperature. At low temperatures, the number of successful collisions between the enzyme and substrate in reduced because their molecular movement decreases. The reaction is slow. - Temperature does not change the structure of the substrate. Hence, c one is the correct answer.
Shift-II
Biomolecules
185338
Which of the following statements are true regarding lipids? a) Glycerol is a simple lipid trihydroxy propane. b) In triglycerides fatty acid is esterified with glycerol. c) The melting point of oils is higher than that of fats. d) Saturated fatty acids do not have double bonds
1 abd
2 abc
3 acd
4 bcd
Explanation:
Exp: A Among the following statements (a) is true. Glycerol is a simple lipid that is made up of three hydroxyl groups \((-\mathrm{OH})\) bonded to a carbon skeleton. Because of the presence of three hydroxyl groups, it is called trihydroxy. Propane is a three-carbon alkane with the molecular formula \(\mathrm{C}_{3} \mathrm{H}_{8}\). When three hydrogen atoms of propane are replaced by three hydroxyl groups, this gives rise to a molecule of glycerol. Statement (b) is also true. In triglycerides, three fatty acids are esterifies to glycerol. - Statement (c) is false. The melting point of oils is lower than that of fats. Oils are liquid at room temperature, while fats are solid. This is because oils have more double bonds in their fatty acids, which makes them less saturated. - Statement (d) is true. Saturated fatty acids do not have double bonds. The saturated fatty acids are stable and are short chain fatty acids. When the hydrogen reacts with the unsaturated fatty acid, all the double bonds are converted into the single bonds.
Shift-II
Biomolecules
185354
Given below is the chemical formula of
1 palmitic acid
2 glycerol
3 galactose
4 stearic acid
Explanation:
Exp: A The given chemical formula is of palmitic acid. It is the most common saturated fatty acid found in animals, plant and microorganisms. Its chemical formula is \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{14} \mathrm{COOH}\) and is represented as :
JIPMER-2014
Biomolecules
185344
Which one among the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
1 Adenine, Thymine - Purines
2 Guanine, Adenine - Purines
3 Uracil, Cytosine - Pyrimidines
4 Thymine, Uracil - Pyrimidines
Explanation:
Exp: A There are 5 types of nitrogenous bases, categorized under purines and pyrimidines. The purine contains bases are Adenine and Guanine while pyrimidine contains Cytosine, Thymine and Uracil. Adenine, Guanine, Cytosine and Thymine are found in DNA while Thymine is replaced by Uracil in RNA.
JCECE-2018
Biomolecules
185346
Which one of the following biomolecules is synthesized in smooth endoplasmic reticulum
1 Proteins
2 Lipids
3 Carbohydrates
4 Nucleotides
Explanation:
Exp: B Lipid molecules in the cell are synthesized by the smooth endoplasmic reticulum. The rough endoplasmic reticulum synthesizes proteins. Golgi apparatus synthesizes complex sugars and plastids are involved in the synthesis of carbohydrates through photosynthesis.
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Biomolecules
185337
Assertion (A) : Enzymes are inactivated at low temperature Reason (R) : Temperature changes the structure of the substrate The correct option among the following is
1 (A) and (R) are true, (R) is the correct explanation for \((\mathrm{A})\)
2 (A) and (R) are true, but (R) is not the correct explanation for \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
Explanation:
Exp: C (A) is true but (R) is false. - Enzymes are inactivated at low temperature. At low temperatures, the number of successful collisions between the enzyme and substrate in reduced because their molecular movement decreases. The reaction is slow. - Temperature does not change the structure of the substrate. Hence, c one is the correct answer.
Shift-II
Biomolecules
185338
Which of the following statements are true regarding lipids? a) Glycerol is a simple lipid trihydroxy propane. b) In triglycerides fatty acid is esterified with glycerol. c) The melting point of oils is higher than that of fats. d) Saturated fatty acids do not have double bonds
1 abd
2 abc
3 acd
4 bcd
Explanation:
Exp: A Among the following statements (a) is true. Glycerol is a simple lipid that is made up of three hydroxyl groups \((-\mathrm{OH})\) bonded to a carbon skeleton. Because of the presence of three hydroxyl groups, it is called trihydroxy. Propane is a three-carbon alkane with the molecular formula \(\mathrm{C}_{3} \mathrm{H}_{8}\). When three hydrogen atoms of propane are replaced by three hydroxyl groups, this gives rise to a molecule of glycerol. Statement (b) is also true. In triglycerides, three fatty acids are esterifies to glycerol. - Statement (c) is false. The melting point of oils is lower than that of fats. Oils are liquid at room temperature, while fats are solid. This is because oils have more double bonds in their fatty acids, which makes them less saturated. - Statement (d) is true. Saturated fatty acids do not have double bonds. The saturated fatty acids are stable and are short chain fatty acids. When the hydrogen reacts with the unsaturated fatty acid, all the double bonds are converted into the single bonds.
Shift-II
Biomolecules
185354
Given below is the chemical formula of
1 palmitic acid
2 glycerol
3 galactose
4 stearic acid
Explanation:
Exp: A The given chemical formula is of palmitic acid. It is the most common saturated fatty acid found in animals, plant and microorganisms. Its chemical formula is \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{14} \mathrm{COOH}\) and is represented as :
JIPMER-2014
Biomolecules
185344
Which one among the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
1 Adenine, Thymine - Purines
2 Guanine, Adenine - Purines
3 Uracil, Cytosine - Pyrimidines
4 Thymine, Uracil - Pyrimidines
Explanation:
Exp: A There are 5 types of nitrogenous bases, categorized under purines and pyrimidines. The purine contains bases are Adenine and Guanine while pyrimidine contains Cytosine, Thymine and Uracil. Adenine, Guanine, Cytosine and Thymine are found in DNA while Thymine is replaced by Uracil in RNA.
JCECE-2018
Biomolecules
185346
Which one of the following biomolecules is synthesized in smooth endoplasmic reticulum
1 Proteins
2 Lipids
3 Carbohydrates
4 Nucleotides
Explanation:
Exp: B Lipid molecules in the cell are synthesized by the smooth endoplasmic reticulum. The rough endoplasmic reticulum synthesizes proteins. Golgi apparatus synthesizes complex sugars and plastids are involved in the synthesis of carbohydrates through photosynthesis.
185337
Assertion (A) : Enzymes are inactivated at low temperature Reason (R) : Temperature changes the structure of the substrate The correct option among the following is
1 (A) and (R) are true, (R) is the correct explanation for \((\mathrm{A})\)
2 (A) and (R) are true, but (R) is not the correct explanation for \((\mathrm{A})\)
3 (A) is true but (R) is false
4 (A) is false but (R) is true
Explanation:
Exp: C (A) is true but (R) is false. - Enzymes are inactivated at low temperature. At low temperatures, the number of successful collisions between the enzyme and substrate in reduced because their molecular movement decreases. The reaction is slow. - Temperature does not change the structure of the substrate. Hence, c one is the correct answer.
Shift-II
Biomolecules
185338
Which of the following statements are true regarding lipids? a) Glycerol is a simple lipid trihydroxy propane. b) In triglycerides fatty acid is esterified with glycerol. c) The melting point of oils is higher than that of fats. d) Saturated fatty acids do not have double bonds
1 abd
2 abc
3 acd
4 bcd
Explanation:
Exp: A Among the following statements (a) is true. Glycerol is a simple lipid that is made up of three hydroxyl groups \((-\mathrm{OH})\) bonded to a carbon skeleton. Because of the presence of three hydroxyl groups, it is called trihydroxy. Propane is a three-carbon alkane with the molecular formula \(\mathrm{C}_{3} \mathrm{H}_{8}\). When three hydrogen atoms of propane are replaced by three hydroxyl groups, this gives rise to a molecule of glycerol. Statement (b) is also true. In triglycerides, three fatty acids are esterifies to glycerol. - Statement (c) is false. The melting point of oils is lower than that of fats. Oils are liquid at room temperature, while fats are solid. This is because oils have more double bonds in their fatty acids, which makes them less saturated. - Statement (d) is true. Saturated fatty acids do not have double bonds. The saturated fatty acids are stable and are short chain fatty acids. When the hydrogen reacts with the unsaturated fatty acid, all the double bonds are converted into the single bonds.
Shift-II
Biomolecules
185354
Given below is the chemical formula of
1 palmitic acid
2 glycerol
3 galactose
4 stearic acid
Explanation:
Exp: A The given chemical formula is of palmitic acid. It is the most common saturated fatty acid found in animals, plant and microorganisms. Its chemical formula is \(\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{14} \mathrm{COOH}\) and is represented as :
JIPMER-2014
Biomolecules
185344
Which one among the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
1 Adenine, Thymine - Purines
2 Guanine, Adenine - Purines
3 Uracil, Cytosine - Pyrimidines
4 Thymine, Uracil - Pyrimidines
Explanation:
Exp: A There are 5 types of nitrogenous bases, categorized under purines and pyrimidines. The purine contains bases are Adenine and Guanine while pyrimidine contains Cytosine, Thymine and Uracil. Adenine, Guanine, Cytosine and Thymine are found in DNA while Thymine is replaced by Uracil in RNA.
JCECE-2018
Biomolecules
185346
Which one of the following biomolecules is synthesized in smooth endoplasmic reticulum
1 Proteins
2 Lipids
3 Carbohydrates
4 Nucleotides
Explanation:
Exp: B Lipid molecules in the cell are synthesized by the smooth endoplasmic reticulum. The rough endoplasmic reticulum synthesizes proteins. Golgi apparatus synthesizes complex sugars and plastids are involved in the synthesis of carbohydrates through photosynthesis.
