JEE Mains · Chemistry · STD 12 - 10. Biomolecules
Which one of the following statements not true\(?\)
- A Lactose contains \(\alpha-\) glycosidic linkage between \(C _{1}\) of galactose and \(C _{4}\) of glucose.
- B Lactose \(\left( C _{11} H _{22} O _{11}\right)\) is a disaccharide and it contains \(8\) hydroxyl groups.
- C On acid hydrolysis, lactose gives one molecule of \(D(+)-g l u\) cose and one molecule of \(D (+)\)\(-\)galactose.
- D Lactose is a reducing sugar and it gives Fehling's test.
Answer & Solution
Correct Answer
(A) Lactose contains \(\alpha-\) glycosidic linkage between \(C _{1}\) of galactose and \(C _{4}\) of glucose.
Step-by-step Solution
Detailed explanation
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- "X" is an oxoanion of the lightest element of group 7(in the periodic table). The metal is in +6 oxidation state in "X". The color of the potassium salt of X isJEE Mains 2026 Easy
- Total number of tripeptides possible by mixing of valine and proline is \(............\).JEE Mains 2023 Medium
- Accumulation of which of the following molecules in the muscles occurs as a result of vigorous exercise ?JEE Mains 2015 Hard
- During the detection of acidic radical present in a salt, a student gets a pale yellow precipitate soluble with difficulty in \(NH _4 OH\) solution when sodium carbonate extract was first acidified with dil. \(HNO _3\) and then \(AgNO _3\) solution was added. This indicates presence of _______.JEE Mains 2024 Medium
- 500 mL of 1.2 M KI solution is mixed with 500 mL of \(0.2~M~KMnO _4\) solution in basic medium. The liberated iodine was titrated with standard \(0.1~M~Na _2 S_2 O _3\) solution in the presence of starch indicator till the blue color disappeared. The volume (in L ) of \(Na _2 S_2 O _3\) consumed is __________. (Nearest integer)JEE Mains 2026 Easy
- For the reaction \(\mathrm{A} \rightarrow\) products.
The concentration of A at 10 minutes is _______ \(\times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}\) (nearest integer). The reaction was started with \(2.5 \mathrm{~mol} \mathrm{~L}^{-1}\) of A.JEE Mains 2025 Medium
More PYQs from JEE Mains
- The value of
\(\int_{e^2}^{e^4} \frac{1}{x}\left(\frac{e^{\left(\left(\log _e x\right)^2+1\right)^{-1}}}{e^{\left(\left(\log _e x\right)^2+1\right)^{-1}}+e^{\left(\left(6-\log _e x\right)^2+1\right)^{-1}}}\right) d x\) isJEE Mains 2025 Medium - Compound \(A\) is converted to \(B\) on reaction with \(\mathrm{CHCl}_{3}\) and \(\mathrm{KOH}\). The compound \(\mathrm{B}\) is toxic and can be decomposed by \(C.\) \(A, B\) and \(C\) respectively are :JEE Mains 2021 Easy
- For a nucleus of mass number \(A\) and radius \(R\), the mass density of nucleus can be represented as how?JEE Mains 2025 Easy
- A paper dipped in a dil. \(H_2SO_4\) solution of '\(X\)' upon treatment with \(SO_2\) gas turns into green. The compound '\(X\)' is :JEE Mains 2026 Easy
- \(A \rightarrow B\) The rate constants of the above reaction at \(200 \,K\) and \(300 \,K\) are \(0.03 \,min ^{-1}\) and \(0.05 \,min ^{-1}\) respectively. The activation energy for the reaction is \(....J\) (Nearest integer) (Given : In \(10=2.3\) \(R =8.3\,J\,K ^{-1}\, mol ^{-1}\) \(\log 5=0.70\) \(\log 3=0.48\) \(\log 2=0.30\)JEE Mains 2023 Medium
- For a thin symmetric prism made of glass (refractive index \(1.5\)), the ratio of incident angle and minimum deviation will be _______.JEE Mains 2026 Medium