Biochemistry - Mock Test 25

Question 241

Most diverse macromolecules, found in the cell both physically and chemically are

A) proteins B) carbohydrates C) nucleic acids D) lipids

---

No Details

Question 242

In which one of the following groups, all the three are examples of polysaccharides

A) Starch, glycogen, cellulose B) Sucrose, maltose, glucose C) Glucose, fructose, lactose D) Galactose, starch, sucrose

---

No Details

Question 243

A polysaccharide, which is synthesized and stored in liver cells, is

A) lactose B) galactose C) arabinose D) glycogen

---

No Details

Question 244

Enzymes having slightly different molecular structure but performing identical activity are

A) holoenzymes B) isoenzymes C) apoenzymes D) coenzymes

---

No Details

Question 245

Which is not consistent with double helical structure of DNA

A) A = T, C = G B) Density of DNA decreases on heating C) A + T/C + G is not constant D) Both A and B

---

No Details

Question 246

RNA does not possess

A) uracil B) thymine C) adenine D) cytosine

---

No Details

Question 247

In double helix of DNA, the two DNA strands are

A) coiled around a common axis B) coiled around each other C) Not Coiled D) None of this

---

No Details

Question 248

Two free ribonucleotide units are interlinked with

A) peptide bond B) covalent bond C) hydrogen bond D) phosphodiester bond

---

No Details

Question 249

An enzyme brings about

A) decrease in reaction time B) increase in reaction time C) increase in activation energy D) reduction in activation energy

---

No Details

Question 250

Which is wrong about nucleic acids

A) DNA is single stranded in some viruses B) RNA is double stranded occasionally C) Length of one helix is 45Ã… in B-DNA D) One turn of Z-DNA has 12 bases

---

No Details