McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: All India Pre Medical Test (AIPMT) .
Chapters
| 301. |
A molecule of ATP is structurally most similar to a molecule of? |
| A. | RNA |
| B. | Protein |
| C. | Lipid |
| D. | Amino acid |
| Answer» A. RNA | |
| 302. |
Which is the site of protein synthesis? |
| A. | Chromosomes |
| B. | DNA |
| C. | Polysomes |
| D. | Tonoplast |
| Answer» C. Polysomes | |
| 303. |
Select the specific base pairs of DNA: |
| A. | Adenine and Cytosine |
| B. | Guanine and Adenine |
| C. | Adenine and Thymine |
| D. | Guanine and Uracil |
| Answer» C. Adenine and Thymine | |
| 304. |
The DNA stands are antiparallel because of: |
| A. | Ester bond |
| B. | Phosphodiester bond |
| C. | Disulphide bond |
| D. | Hydrogen bond |
| Answer» B. Phosphodiester bond | |
| 305. |
The distance between two chains of DNA molecules is: |
| A. | 34 A° |
| B. | 20 A° |
| C. | 3.4 A° |
| D. | 10 A° |
| Answer» B. 20 A° | |
| 306. |
The length of one complete spiral of DNA is: |
| A. | 34 A° |
| B. | 3.4 A° |
| C. | 20 A° |
| D. | 340 A° |
| Answer» A. 34 A° | |
| 307. |
Which one of the following bases is found only in RNA and not in DNA? |
| A. | Guanine |
| B. | Adenine |
| C. | Uracil |
| D. | Thymine |
| Answer» C. Uracil | |
| 308. |
The scientists who discovered the structure of DNA molecule |
| A. | Miller and mandal |
| B. | Khorana and Nirenberg |
| C. | Calvin and Wilkinson |
| D. | Waston and Crick |
| Answer» D. Waston and Crick | |
| 309. |
Mention the example of dinuclotide in the given structure. |
| A. | RNA with UA |
| B. | RNA with CG |
| C. | DNA with TA |
| D. | DNA with CG |
| Answer» A. RNA with UA | |
| 310. |
The structure of DNA like a spiral ladder because |
| A. | Purine and Pyrimidine are on the opposite side |
| B. | Purine and Pyrimidine linked with hydrogen bond |
| C. | All nucleotides join through a phosphodiester bond |
| D. | Two polynucleotide chains arranged parallel to each other and are spirally Twisted |
| Answer» D. Two polynucleotide chains arranged parallel to each other and are spirally Twisted | |
| 311. |
The hydrogen bonds between adenine and guanine are |
| A. | 2 |
| B. | 3 |
| C. | 1 |
| D. | 0 |
| Answer» D. 0 | |
| 312. |
Which of the following is correct? |
| A. | A=T |
| B. | C=G |
| C. | G=A |
| D. | A=C |
| Answer» A. A=T | |
| 313. |
Nitrogen bases do not contain |
| A. | Phosphorus |
| B. | Nitrogen |
| C. | Hydrogen |
| D. | Carbon |
| Answer» A. Phosphorus | |
| 314. |
Which one is two ringed nitrogenous base? |
| A. | Thymine |
| B. | Adenine |
| C. | Cytosine |
| D. | Uracil |
| Answer» B. Adenine | |
| 315. |
Which of the following ratio is constant in the DNA of all the species? |
| A. | A+U / T+C |
| B. | A+G/ C+T |
| C. | A+C / T+G |
| D. | A+T / C+G |
| Answer» D. A+T / C+G | |
| 316. |
m-RNA is the polymer of |
| A. | Ribonucleotide |
| B. | Ribonucleoside |
| C. | Deoxyribonucleotide |
| D. | Ribosome |
| Answer» A. Ribonucleotide | |
| 317. |
Which of the following is incorrect? |
| A. | m-RNA is degreased after its function is over |
| B. | t-RNA are synthesized by m-RNA |
| C. | r-RNA is localized in the ribosome |
| D. | m-RNA carries genetic code in to cytoplasm |
| Answer» B. t-RNA are synthesized by m-RNA | |
| 318. |
Which is longest of all RNA? |
| A. | m-RNA |
| B. | t-RNA |
| C. | r-RNA |
| D. | None above |
| Answer» A. m-RNA | |
| 319. |
The common instant source of energy of cellular activities is |
| A. | Mitochondria |
| B. | DNA |
| C. | RNA |
| D. | ATP |
| Answer» D. ATP | |
| 320. |
Which one is known as adapter molecule? |
| A. | DNA |
| B. | m-RNA |
| C. | t-RNA |
| D. | r-RNA |
| Answer» C. t-RNA | |
| 321. |
The RNA transporting amino acid to the protein synthesizing site known as |
| A. | t-RNA |
| B. | r-RNA |
| C. | m-RNA |
| D. | Any one of a, b, c |
| Answer» A. t-RNA | |
| 322. |
Match the column and find out the correct combination
|
| A. | P-v, Q-iii, R-ii, S-i, T-iv |
| B. | P-v, Q-iii, R-iv, S-I, T-ii |
| C. | P-iii, Q-v, R-i, S- ii, T-iv |
| D. | P-v, Q-i, R-ii, S-iii, T-iv |
| Answer» A. P-v, Q-iii, R-ii, S-i, T-iv | |
| 323. |
Which is the special function of t-RNA? |
| A. | Pick up code for m-RNA and bring it to r-RNA |
| B. | Do protein synthesis |
| C. | Carries the coded genetic information in to the cytoplasm |
| D. | An adapter for attaching amino acid to m-RNA template during Protein synthesis |
| Answer» D. An adapter for attaching amino acid to m-RNA template during Protein synthesis | |
| 324. |
Which are proportionally more compounds in all RNA’s? |
| A. | m-RNA |
| B. | t-RNA |
| C. | r-RNA |
| D. | a, b, c all |
| Answer» C. r-RNA | |
| 325. |
Which is the part of DNA molecules that varies among DNA molecule |
| A. | Pentose sugar |
| B. | nitrogen base |
| C. | phosphate |
| D. | a & b both |
| Answer» B. nitrogen base | |
| 326. |
which kind of arrangement lies in the two polynucleotide chain of DNA? |
| A. | Antiparallel and complementary |
| B. | parallel and complementary |
| C. | Independent |
| D. | None above |
| Answer» A. Antiparallel and complementary | |
| 327. |
If the one base chain sequence of DNA is ACGTTGG then what will be the base Sequence of opposite chain |
| A. | TGCAACC |
| B. | GTAGGAA |
| C. | CATGGTT |
| D. | TAGCCGG |
| Answer» A. TGCAACC | |
| 328. |
What is ATP? |
| A. | Pentose sugar + adenine + 3 molecule phosphate |
| B. | Hexose sugar + adenine + 3 molecule phosphate |
| C. | Amino acid + adenine + 3 molecule phosphate |
| D. | a or b both |
| Answer» A. Pentose sugar + adenine + 3 molecule phosphate | |
| 329. |
What is enzyme? |
| A. | All proteins which are in all living cell |
| B. | Chemicals which act as biological catalysts |
| C. | All amino acid which are in polypeptide chain |
| D. | All above |
| Answer» B. Chemicals which act as biological catalysts | |
| 330. |
Which of the following is not true for enzyme |
| A. | Water soluble and colloidal in nature |
| B. | Lowers the activation energy level |
| C. | Used up in the biochemical reaction |
| D. | Affected by the change in temperature |
| Answer» C. Used up in the biochemical reaction | |
| 331. |
What is Ribozymes? |
| A. | Only nucleic acids |
| B. | ony protein |
| C. | Some nucleic acids that behave like enzyme |
| D. | M ore than one Ribosome |
| Answer» C. Some nucleic acids that behave like enzyme | |
| 332. |
Enzymes are present in which parts of plant? |
| A. | Only in leaves |
| B. | Only in fruits |
| C. | In apical meristem of root and shoot |
| D. | in all the living cell of plant body |
| Answer» D. in all the living cell of plant body | |
| 333. |
What is an apoenzyme? |
| A. | Protein |
| B. | Amino acid |
| C. | metallic ions |
| D. | Carbohydrates |
| Answer» A. Protein | |
| 334. |
What is co – enzyme? |
| A. | Always a protein |
| B. | always a amino acid |
| C. | Often a vitamin |
| D. | Often a protein |
| Answer» C. Often a vitamin | |
| 335. |
Find out the correct function of co-enzyme? |
| A. | In association with apoenzyme and make it effective |
| B. | Independently of the apoenzyme |
| C. | In association with any protein and make it effective |
| D. | None above |
| Answer» A. In association with apoenzyme and make it effective | |
| 336. |
Which one property is not true for enzyme? |
| A. | It effective for one reaction is not useful in another reaction |
| B. | It is amphoteric in nature |
| C. | All enzymes are bidirectional |
| D. | They are not destroyed |
| Answer» C. All enzymes are bidirectional | |
| 337. |
The rate of most of enzyme catalyzed reaction changes with PH as the PH Increases this rate? |
| A. | Reaches a maximum |
| B. | Reaches a minimum |
| C. | Decreases |
| D. | Increases |
| Answer» A. Reaches a maximum | |
| 338. |
Near freezing point an enzyme is |
| A. | Slightly activated |
| B. | Inactivated |
| C. | Denatured |
| D. | Destroyed |
| Answer» B. Inactivated | |
| 339. |
A temperature change from 30o
|
| A. | Increase |
| B. | Decrease |
| C. | First increase and then decrease |
| D. | First decrease and then increase |
| Answer» C. First increase and then decrease | |
| 340. |
An enzyme brings about |
| A. | Activation energy level |
| B. | Increase in reaction time |
| C. | Decrease in activation energy level |
| D. | all above |
| Answer» C. Decrease in activation energy level | |
| 341. |
Enzymes are polymers of: |
| A. | Fatty acid |
| B. | Phosphate |
| C. | Amino acid |
| D. | Nucleotides |
| Answer» C. Amino acid | |
| 342. |
Which one is not correct for enzyme? |
| A. | They all are biocatalysts |
| B. | They all are colloidal |
| C. | They all are proteins |
| D. | All proteins are enzymes |
| Answer» D. All proteins are enzymes | |
| 343. |
Inorganic catalyst recognized what when it attached an enzyme? |
| A. | Activator |
| B. | Co- enzyme |
| C. | Inhibitor |
| D. | Apoenzyme |
| Answer» A. Activator | |
| 344. |
At which place the substrate combines with the enzymes: |
| A. | Active site |
| B. | inactive site |
| C. | Common site |
| D. | Gap site |
| Answer» A. Active site | |
| 345. |
Fill it E + S ________ |
| A. | E-S |
| B. | E-S complex |
| C. | product |
| D. | enzyme |
| Answer» B. E-S complex | |
| 346. |
Enzyme and substrate complementary each other such as |
| A. | Pencil & eraser |
| B. | Pen & Paper |
| C. | Lock & key |
| D. | all above |
| Answer» C. Lock & key | |
| 347. |
Which one of the following chemical is classified as an enzyme? |
| A. | Try glyceride |
| B. | Cellulose |
| C. | Galactose |
| D. | Sucrase |
| Answer» D. Sucrase | |
| 348. |
In the cell digestive enzymes are mostly in which cell organells? |
| A. | Ribosome |
| B. | vacuoles |
| C. | Lysosomes |
| D. | Mitochondria |
| Answer» C. Lysosomes | |
| 349. |
Enzymes are named after their substrate adding suffix – |
| A. | —- In |
| B. | — ase |
| C. | — ose |
| D. | — on |
| Answer» B. — ase | |
| 350. |
The enzyme which removes hydrogen from the substrate is known as: |
| A. | Oxido-reductase |
| B. | Dehydrogenase |
| C. | Hydrogenase |
| D. | Hydrolyses |
| Answer» B. Dehydrogenase | |
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