MDCAT BIOLOGY FLP-24 (SMART INSTITUTE)

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MDCAT Biology Quiz: Test Your Knowledge

Prepare yourself for the MDCAT with our comprehensive biology quiz designed to challenge your understanding of key biological concepts. Whether you're studying for exams or simply want to improve your knowledge, this quiz offers a variety of questions that cover essential topics in biology.

Key Features:

68 multiple choice questions
Variety of biology topics
Ideal for MDCAT preparation

68 Questions17 MinutesCreated by LearningTree374

1-Mating between relatives is called which of the following?

Ex breeding

Breeding

Inbreeding

Outbreeding

2-Function of smooth endoplasmic reticulum is

Synthesis of intracellular proteins

Synthesis extracellular proteins

Synthesis of extracellular enzymes

Synthesis of lipids

3-What type of enzyme is myosin?

ATP synthase

ADP synthase

ADP hydrolase

ATP hydrolase

4-Which statement is correct?

In heteromorphic generations are vegetatively dissimilar

In isomorphic generations are vegetatively similar

In isomorphic generations are vegetatively dissimilar

Both A and B

5-If more oxygen is present, the rubisco starts

Respiration

Photorespiration

Carboxylase

None of these

6-Specific heat of vaporization of water is ...............Kcal/kg

674

874

774

574

7-Cellular respiration is essentially what type of process

Oxidation

Reduction

Redox

None of these

8-In non-competitive inhibition, the extent of inhibition depends only on

Concentration enzyme

Concentration of substrate

Concentration of ES complex

Concentration of inhibitor

9-In most triploblasts after embryonic development the three layers are represented as

Separate layers of cells

Structures associated with them

Their functions in body

Structures formed from them

10-Which of these cells is not present in phloem

Companion cell

Sieve tube members

Vessels

Parenchyma

11-The end or complete stop of the menstrual cycle is called

Ovulation

Menstruation

Fertilization

Menopause

12-Viruses that attack bacteria are called

Virophage

Lysophage

Bacteriophage

None of these

13-One of the actions of the parasympathetic nervous system is

Inhibits peristalsis

Dilates bronchioles

Construction of pupils

Sweat secretion

14-Which enzyme is found in saliva

Pepsin

Lipase

Ptyalin

Lactase

15-What type of protein is Fibrin

Functional

Structural

Enzymatic

All of these

16-What is the copper contaning protein involved in the ETC in plants

17-2nd meiotic division in oocyte is completed during

When ovum is discharged from the ovary

Just before fertilization

Before the onset of menstruation

When oocyte is fertilized by sperm

18-Golgi complex is responsible for the formation of secretory granules in ......... cell.

Stomach

Liver

Pancreas

Muscle

19-When the glucose level in blood comes down, glucose is synthesized from

Fats

Glycogen

Amino acids

DNA

20-Which is most likely to extend the entire length of a muscle fibre

Sarcomere

Myofibrils

Myosin filament

M-line

21-In humans gill pouches have evolved into which of the following organs

Nose

Ear

Pharynx

Eustachian tubes

22-The cell wall is not present in which of the following bacteria

Cocci

Bacilli

Mycobacterium

Mycoplasm

23-In which category of bacteria does Neisseria most likely fall

Cocci

Bacilli

Spirochete

None of these

24-Second largest phylum of invertebrates is which of the following

Porifera

Arthropoda

Chordata

Mollusca

25-ATP molecules are consumed during which process

Glycolysis

Krebs cycle

Light dependent phase

None

26-When HIV becomes AIDS

When it attacks the T cells

When it replicates at maximum level

When it destroys the body cells

All of these

27-The union of meiotically produced specialized sex cells from each parents produce

Fertilized egg

Unfertilized egg

Zygote

None of these

28-During inspiration, the area of the thoracic cavity will

Contracts

Increase

Decrease

Damage

29-A series of C shaped cartilage rings are found in the

Epiglottis

Trachea

Bronchi

None of these

30- 60 S and 40 S submit combine to form when size particle?

80 S

90 S

100 S

110 S

31-In icosahedral, in which the capsomeres are arranged in

32-Chemical substances used on living tissues that inhibit the growth of microorganism are called

Disinfectant

Sanitizer

Antibiotic

Antiseptics

33-Which chemical reactions occur during the process of photosynthesis

Oxidation

Reduction

Both A and B

NONE

34-According to Hardy-Weinberg theorem, frequencies of alleles and genotypes in a population's gene pool remain?

Mobile in gene pool

Stationary in gene pool

Constant

Constant unless acted by agents than sexual recombination

35-Which of the following organism has an eel like body

Chondrichthyes

Osteichythyes

Cyclostomata

Both A and B

36-If the concentration of enzyme is kept constant and amount of substrate is increased a point is reached where increase in substrates concentration does not affect the reaction rate because of

Enzymes get denatured at higher substrate conc.

Rate of reaction is indirectly proportional to substrate concentration at this point

All the active sites on enzyme molecule are occupied

All of these

37-Which of the following organelles are found in both plant and animal cells?

Central vacuole

Tonoplast

Cell wall

Peroxisome

38-Which combination of class and its description is correct?

Osteichthyes-a bony endoskeleton & gills covered by operculum

Reptilia-left aortic arch & internal fertilization

Nematoda-triploblastic & acoelomates

Cephalopods-dorrsal nerve cord 7 bilateral symmetry

39-In mammalian male, the reproductive and excretory system share the same

Vas deferens

Ureter

Urinary bladder

Urethra

40-Which disease is represented by excess MSH secretion

Addison's

Alzheimer's

Parkinson's

Crohn's

41-Enzymes which control cellular respiration are present in

Mitochondria

Nucleus

Ribosomes

Chloroplast

42-What gives the definite shape to a virion

Envelope

Capsid

Capsomeres

Prions

43-In females, the progesterone and estrogen hormone is secreted by

Ovaries

Testes

Egg

Kidneys

44-Inbreeding reduces the fitness of a population. This the result of which increased genetic effect of inbreeding

Rate spontaneous mutation

Levels of aggression

Genetic diversity

Expression of deleterious traits

45-The following enzymes are regulated by calcium ions

DNA polymerase

Adenylate cyclase

Phosphoprotein phosphatase

Nitric oxide synthetase

46-In a dihybrid cross, what fraction of offspring will be homozygous for both traits

1/2

1/4

1/8

1/16

47-In which of these reflexes, a skeletal muscle contraction causes the agonist muscle to simultaneously lengthen and relax

Stretch reflex

Spinal reflex

Golgi tendon reflex

Crossed extensor reflex

48-The sarcoplasmic reticulum is a special type of endoplasmic reticulum. Based on this information, which of the following is associated with a sarcoplasmic reticulum

Network of tubules

Vesicles

Digestive enzymes

Both network tubules and vesicles

49-What is reduced during sugar production in photosynthesis

ATP

NADH

CARBON DIOXIDE

OXYGEN

50-Skeletal muscle is composed of cells collectively referred to as

Muscle fibrin

Muscle fibers

Sarcomere

None of these

51-The pay-off phase of glycolysis conserves the

Molecules of glucose

Molecules of fructose

ATP

Water

52-Which of the following comes under structural classification

Synchondroses

Sutures

Gomphosis

All of these

53-The structure with a diameter less than 1 mm are

Bronchioles

Bronchi

Alveoli

Air sac

54-What is a key difference between spermatogenesis and oogenesis?

Spermatogenesis results in only 1 aperm; oogenesis results in 4 eggs

Spermatogenesis results in 2 sperms; oogenesis results in only 1 egg

Spermatogenesis results in 8 sperms ; oogenesis results in only 4 eggs

Spermatogenesis results in 4 sperms; oogenesis results in only 1 egg

55-The experiment that stimulated conditions throught to be present on the early earth

Hershey chase experiment

Geiger marsden experiment

Schiehallion experiment

Miller-urey experiment

56-The optimum pH for enzyme arginase

9.7

9.3

57-Ascaris is characterized by which of the following

Pancreas of true coelom and metamerism

Presence of true coelom but the absence of metamerism

Absence of true coelom but the presence of metamerism

Absence of true coelom and metamerism

58-In prokaryotes, ribosomes are

50S + 40S

60S + 40S

80S

70S

59-Damage to one of the following immediately kills the cell whether its prokaryotic or eukaryotic

Nucleus

Cell membrane

Mitochondria

All of these

60-Which of the following is NOT an example of positive feedback

A forest fire slowly expands outward, which provides it with even more fuel to burn

During childbirth, oxytocin creates a stimulus which causes the hypothalamus to release more oxytocin

As more buffalo begin to run in a herd, the overall level of panic increases. This results in even more buffalo running

As blood calcium increase, parathyroid hormone

61-The phage components begin to assemble into mature phage only after the synthesis of?

Structural protein

Nucleic acid

Both A and B

Amino acids

62-The ventral root of the spinal cord contains axons of

Sensory neuron

Motor neuron

Mixed neuron

Spinal neuron

63-Which of the following is not an evidence for evolution

Fossil record

Common ancestor organisms

Vestigial structures

None of these

64-Which of following is a phospholipid

Sterol

Cholesterol

Lecithin

Steroid

65-The brain area responsible for screening all incoming sensory data is

Hypothalamus

Thalamus

Cerebellum

Cerebral cortex

66-Which of the following is synthesized by free ribosomes of cytoplasm in humans

DNA polymerase

Salivary amylase

Pancreatic amylase

DNA helicase

67-Phylum Porifera is classified based on which of the following characteristic?

Branching

Symmetry

Spicules

Reproduction

68- ssRNA (+) that is transcribed into double-stranded DNA by

DNA dependent DNA polymerase

DNA dependent RNA polymerase

RNA dependent DNA polymerase

RNA dependent RNA polymerase

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MDCAT BIOLOGY FLP-24 (SMART INSTITUTE)

MDCAT Biology Quiz: Test Your Knowledge

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