MCAT Biology MCQs ChapterWise for Entry Test

mcat biology mcqs chapter wise
mcat biology mcqs chapter wise
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MCAT Biology MCQs ChapterWise

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MCAT Biology MCQs ChapterWise

301. Inhibitors which block the enzyme by forming weak bond are called___________?

A. Competitive inhibitors.
B. Non-competitive inhibitors
C. Irreversible inhibitors.
D. Both a and b

302. Which of the statement about cell membrane is not true?

A. It contains protein molecules embedded in lipid bilayer
B. It is a differentially permeable membrane.
C. It contains charged pores thus ions being charged particles cross cell membrance much easier than neutral particles.
D. It may get infolded to engulf solid or liquid material.

303. A substance which binds at the active site of the enzyme but does not result in the formation of the products is called________________?

A. Irreversible inhibitor
B. Reversible inhibitor
C. Competitive inhibitor
D. Non-competitive inhibitor

304. A chemical substance which can react (in place of substrate) with the enzyme but is not transformed into product/s and thus blocks the active site temporarily or permanently is called_______________?

A. Co-enzyme
B. Blocker
C. Inhibitor
D. Cofactor

305. Optimal temperature of enzymes present in human body is_____________?

A. 27?C
B. 37?C
C. 47?C
D. 30?C

306. Strengthening material of prokaryotic cell wall is__________?

A. Cellulose
B. Chitin
C. Inorganic salts silica waxes and ligin
D. Peptidoglycan or Murein.

307. Spherical or tubular membranes which separate the material present in endoplasmic reticulum from that of cytoplasmic material are called__________?

A. Cytosol
B. Cisternae
C. Polysomes
D. Cristae

308. Whone is not the function of endoplasmic reticulum?

A. Nerve impulse conduction
B. Transport of material
C. Mechanical support
D. Synthesis of conjugated molecules

309. 60S and 40S subunit combine to form ________ particle.

A. 100 S
B. 90 S
C. 80 S
D. 70 S

310. Pancreas produces secretory granules that help in digestion. These granules after passing through endoplasmic reticulum are pinched off from ________ surface of Golgi apparatus:

A. Forming face
B. Maturating face
C. Any of them
D. None of these

311. Which of the following statement is incorrect about Glyoxisomes?

A. They contain enzymes which help in conversion of fatty acids into carbohydrate
B. They are abundant in soyabeans but absent in pea.
C. They are present through out life of a plant and provide them whth energy through Glyoxylate cycle.
D. They are signle membranous organelles

312. Ribosomes + m-RNA?

A. Polysome
B. Phlosome
C. Polosome
D. None of these

313. Which of the following impart a red colour to Rose petals?

A. Chloroplast
B. Chlorophyll
C. Chromoplast
D. Leucoplast

314. During digesting the phagocytosed food particles vesicles formed from fusion of phagocytic vacuole with the enzymes secreted by Golgi apparantus are called_______?

A. Lysosomes
B. Primary lysosomes
C. Secondary lysosomes
D. Food vacuole

315. The bond formed when two or more atoms complete their electron shells by sharing electrons is called_____________?

A. Ionic bond
B. Hydrogen bond
C. Covalent bond
D. Electrovalent bond

316. Which one is the basic element of organic compounds _________________?

A. Oxygen
B. Hydrogen
C. Sulphur
D. Carbon

317. Reactions in which simple substances are combined to form complex substances are called_____________?

A. Metabolic reactions
B. Catabolic reactions
C. Anabolic reactions
D. None of these

318. Which chemical component has the same % in bacterial as well as the mammalian cell_____________?

A. Water
B. Carbohydrate
C. Proteins
D. Lipids

319. The branch of biology which deals with the study of chemical compounds and the chemical processes in the fliving organisms is called_________________?

A. Chemistry
B. Biochemistry
C. Molocular biology
D. Both a and b

320. Which chemical component has the greatest contribution in the total mammalian cell weight__________?

A. Proteins
B. Carbohydrate
C. Lipids
D. Water

321. Which one is an organic compound_____________?

A. CO2
B. Water
C. Lipids
D. HCI

322. Carbon atom is_____________?

A. Monovalent
B. Divalent
C. Trivalent
D. Tetravalent

323. The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is_______________?

A. High specific heat of vaporization
B. High specific heat capacity
C. Its Dipole nature
D. Its liquid state

324. The number of calories required to raise the temperature of 1g of water from 15 to 16?C is called___________?

A. Specific Heat of Vaporization
B. Specific Heat capacity
C. Caloric Heat
D. Both A and C

325. The one which is present in all living things is ___________?

A. Cell nucleus
B. DNA or RNA
C. Cell membrane
D. Vacuole

326. The mechanism of stomatal movement is related to the branch of Biology called__________?

A. Taxonomy
B. Physiology
C. Morphology
D. Anatomy

327. Which of the following substance is most favorable to form structural component of biological membranes___________?

A. Hydrophilic Carbohydrates
B. Hydrophobic fats.
C. Both a and b
D. None of these

328. Maximum number of species of living things on earth are___________?

A. Algae
B. Fungi
C. Insects
D. Protozoa

329. Which statement is true about an aqueous medium________________?

A. Ionic as well as non ionic substance in aqueous media retains their identity
B. Enzymes cannot perform catalysis reaction in this medium
C. Ions and molecules move randomly thus are in more favorable state to react with other molecules and ions
D. It is less favorable media for chemical reactions

330. Which of the following carbohydrate is tasteless___________?

A. Monosaccharide
B. Oligosaccharide
C. Polysaccharide
D. None of these

331. Which of the statement is not true for compounds like glycoprotein and glycolipids____________?

A. They are conjugated molecules of carbohydrates
B. Both have role in the extra cellular matrix of animals and bacterial cell wall
C. They are components of biological membranes.
D. Both are produced and secreted by endoplasmic reticulum

332. A complex substance which on hydrolysis yields polyhydroxy aldehyde or ketone subunits is called__________?

A. Lipid
B. Carbohydrate
C. Protein
D. Carotein

333. Specific heat of vaporization of water is_______________?

A. 574 Kcal/kg
B. 674 Kcal/kg
C. 774 Kcal/kg
D. 874 Kcal/kg

334. Cn(H2O)n. is a general formula of_____________?

A. Monosaccharides
B. Oligosaccharides
C. Ploysacharides
D. Carbohydrates

335. Which one is most complex sugar_____________?

A. Monosaccharides
B. Oligosaccharides
C. Polysaccharides
D. None of these

336. Variety among amino acids is produced due to_____________?

A. NH2 group
B. COOH group
C. R group
D. All of these

337. Primary structure of proteins determines__________?

A. Number of polypeptide chains involved
B. Bending of polypeptide chains
C. Amino acid sequence
D. Coiling of polypeptide chains

338. Ribose is an example of___________?

A. Trioses
B. Tetroses
C. Pentose
D. Hexose

339. The one which is not a globular protein__________?

A. Anti Rh-antibody
B. Enzyme
C. Myosin
D. Haemoglobin

340. Starch cellulose and glaycogen yield ___________ on complete hydrolysis?

A. Maltose
B. Sucrose
C. Fructose
D. Glucose

350. ____________% of Glucose normally present in our blood is?

A. 0.80%
B. 0.08%
C. 1.80%
D. 8%

351. Which of the following carbohydrate cannot be hydrolyzed__________________?

A. Monosaccharide
B. Oligosaccharide
C. Polysaccharide
D. None of these

352. An enzyme which converts a dipeptide into separate amino acids is an example of__________?

A. Decarboxylase
B. Hydrolase
C. Oxidoreductase
D. Transferase

353. Which one is soluble in hot water_____________?

A. Starch
B. Glycogen
C. Amylose
D. Amylopectin.

354. For the synthesis of 10g of glucose ______________ of energy is required?

A. 717.6 Kcal
B. 727 Kcal
C. 737 Kcal
D. 747 Kcal

355. Cellular digestion is associated with which organelle__________?

A. Mitochondria
B. Golgi bodies
C. Plastids
D. Lysosomes

356. The covalent bond between two monosaccharide subunits is called________________?

A. Phosphodiester bond
B. Peptide bond
C. Glycosidic Bond
D. Ionic bond

357. The unicellular organisms ingest large molecules into their cytoplasm from the external environment without previously digesting them. This process is called___________?

A. Diffusion
B. Osmosis
C. Phagocytosis
D. Plasmolysis

358. Which of the following polysaccharide is called animal starch_________________?

A. Starch
B. Glycogen
C. Cellulose
D. None of these

359. Which one gives blue colour with iodine_______________?

A. Starch
B. Glycogen
C. Cellulose
D. Polysaccharide

360. Mycoplasmas have been included in bacteria because:

A. Do not have a cell wall
B. Are heterotrophic
C. Lack membrane bounded organelles
D. Reproduce by binary fission

361. Which one is abundant in animals___________?

A. Starch
B. Glycogen
C. Cellulose
D. None of these

362. The one which can tolerate highest external osmotic pressure is __________?

A. Algae
B. Amoeba
C. Fungi
D. Bacteria

363. The cell wall of oomycetes is chiefly composed of___________?

A. Chitin
B. Cellulose
C. Lignin
D. Proteins

364. __________ is example of pure form of cellulose?

A. Silk
B. Wool
C. Cotton
D. Paper

365. A compound produced as a result of a chemical reaction of an alcohol with an acid in which water molecule is released is called________________?

A. Monosaccharide
B. Fatty acid
C. Neutral lipid
D. Nucleic acid

366. Lipids are soluble in which of the following_______________?

A. Water
B. Ether
C. All solvents
D. Not in any of the above

367. One celled green ptotists are included in___________?

A. Monera
B. Algae
C. Slime molds
D. Plants

368. Lipid molecules can store double amount of energy as compared to same amount of carbohydrate because of high number of__________________?

A. C-C bonds
B. C-H bonds
C. C-N bonds
D. C-O bonds

369. Fatty acids containing 18 C atoms and a single double bond is____________?

A. Saturated Fatty acid
B. Unsaturated fatty acid
C. Oleic Acid
D. Plamitic acid

370. Pick the odd one out

A. Psilophyton
B. Rhynia
C. Cooksonia
D. Psilotum

371. Which of the following statement is incorrect5 for fats containing unsaturated fatty acid_____________?

A. They contain double bond
B. They are usually solid at room temperature
C. They are lighter than water
D. Their specific gravity is less than 1

372. Which one the following fatty acid is more soluble in an organic solvent and has higher melting point____________?

A. Acetic acid
B. Butyric acid
C. Palmitic acid
D. All have same

373. Peptide bond is_____________?

A. C-N link
B. C- O lind
C. N-H link
D. C-H link

374. Animals obtain carbohydrates mainly from___________?

A. Glucose
B. Starch
C. Sucrose
D. Glycogen

375. The one which is incorrect pair?

A. Sori – Indusium
B. Arthrophytes – Jointed
C. Dichotomous – Vernation
D. Lycopods – Ground pries

376. Double fertilization occurs in_________?

A. All plants
B. All seed plants
C. Gymnosperms
D. Angiosperms

377. Proteins comprise of ___________% of the total dry weight of a cell?

A. 40%
B. 50%
C. 60%
D. 70%

378. Adult birds normally possess only one functional____________?

A. Ureter
B. Ovary
C. Lung
D. Testis

379. Chemical component/s less in eukaryotic cell as compared to prokaryotic cell is / are (i) lipids (ii) carbodydrates (iii) proteins (iv) DNA_________________?

A. i & ii
B. iii & iv
C. i ii iii & iv
D. iv only

380. Following possess bilateral symmetry as larva and radial symmetry as adult:

A. Chordata
B. Hydra
C. Echinodermata
D. Hemichordata

381. Proteins are polymers of___________?

A. Fatty acids
B. Isoprenoid units
C. Amino acids
D. Nucleotides

382. Which of the following is the empirical formula of chlorophyll b?

A. C55H70O5N4Mg
B. C55H72O6N4Mg
C. C55H70O6N4Mg
D. C55H72O5N4Mg

384. In Glycin an amino acid R group is replaced by____________?

A. H
B. CH3
C. COOH
D. C = O

385. How many moles of carbon dioxide are produced by complete oxidation of one mole of puruvic acid?

A. 1
B. 2
C. 3
D. 6

386. The element in basic structure of proteins which differentiate them from carbohydrates________?

A. C
B. S
C. H
D. N

387. Hunger pangs usually begin ______ after the previous meal.

A. 2-4 hours
B. 6-8 hours
C. 10-12 hours
D. 12-24 hours

388. Total number of amino acids discovered so far in cells and tissues are______________?

A. 20
B. 25
C. 150
D. 170

389. The major constituent of blood plasma is___________?

A. Protein
B. NaCl
C. Water
D. Cholesterol

390. An insulin molecule consists of _________ polypeptide chains?

A. 1
B. 2
C. 3
D. 4

391. The windpipe or trachea lies?

A. Dorsal to oesophagus
B. Ventral to oesophagus
C. Lateral to oesophagus
D. None of these

392. A bond formed by linkage between -OH of carboxyl group of one amino acid and H of amino group of another amino acid which releases water is called__________?

A. Phosphodiester linkage
B. Glycosidic bond
C. Peptide bond
D. Hydrogen bond

393. Total number of amino acids in a hemoglobin molecule are__________?

A. 554
B. 564
C. 574
D. 584

394. Which structure of protein gives information aboutnumber and sequence of amino acids in it_______________?

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

395. Locomotory structures are not found in which of the following group?

A. Amoebas
B. Zooflagellates
C. Ciliates
D. Apicomplexans

396. Hemoglobin molecule exhibits which structural organization of proteins___________?

A. Primary structure
B. Secondary structure
C. Tertiary structure
D. Quaternary structure

397. In an aqueous environment the most stable tertiary conformation is that in which _________ amino acids are buried inside the conformation?

A. Hydrophobic
B. Hydrophilic
C. Basic
D. None of these

398. Which of the following statement is incorrect about RNA_________________?

A. The pentose sugar in it is Ribose.
B. It contains Adenine Guanine Thymine and Cytosine
C. It is present in the nucleoli
D. It may be folded back on itself to give double helical characteristics.

399. Protein coasts of viruses are synthesized in____________?

A. Lytic cycle
B. Lysogenic cycle
C. Both a & b
D. All of these

400. Each turn of DNA contain ____________ nitrogenous base pairs?

A. 5
B. 10
C. 20
D. 25

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