USMLE Step 1 Mock Test 4 - Online MCQ Exam

__________are called digestive glands?

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Your Answer:

Liver Liver
Pancreas Pancreas
Both A, B Both A, B
Kidney Kidney

Iodine-123 is used to:

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Your Answer:

diagnose thyroid problem diagnose thyroid problem
image the brain image the brain
kill cancer cells kill cancer cells
trace the blood flow trace the blood flow

As a larva fish may feed on__________?

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Your Answer:

Ants Ants
Annelids Annelids
Plankton Plankton
All of these All of these

Which organelle is known as the powerhouse of the cell?

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Your Answer:

Ribosome Ribosome
Mitochondria Mitochondria
Golgi apparatus Golgi apparatus
Lysosome Lysosome

Rutherford bombarded _________________ particles in discovery of nucleus?

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Your Answer:

Gamma-rays Gamma-rays
Alpha-rays Alpha-rays
Beta-rays Beta-rays
X-rays X-rays

A hollow sphere filled with water is used as a pendulum bob. As water leaks out, the time period:

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Your Answer:

Increases continuously Increases continuously
Decreases continuously Decreases continuously
Increases then decreases Increases then decreases
Remains constant Remains constant

$\int (3x^2 + 2x) \, dx = $

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Your Answer:

$x^3 + x^2 + C$ $x^3 + x^2 + C$
$6x + 2 + C$ $6x + 2 + C$
$3x^3 + 2x^2 + C$ $3x^3 + 2x^2 + C$
$x^3 + x + C$ $x^3 + x + C$

Methanogens are:

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Your Answer:

Archaebacteria Archaebacteria
Eubacteria Eubacteria
Fungi Fungi
Algae Algae

Torque on a dipole $\vec{p}$ in uniform field $\vec{E}$ is:

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Your Answer:

$\vec{p} \times \vec{E}$ $\vec{p} \times \vec{E}$
$\vec{p} \cdot \vec{E}$ $\vec{p} \cdot \vec{E}$
$pE$ $pE$
Zero Zero

Male of rotifers have reproductive system___________?

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Your Answer:

parthenogenesis parthenogenesis
conjugation conjugation
combination combination
asexual reproduction asexual reproduction

Standard deviation is the:

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Your Answer:

Variance squared Variance squared
Square root of variance Square root of variance
Mean deviation Mean deviation
Range divided by 2 Range divided by 2

Smaller viruses have genes__________?

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Your Answer:

one one
two two
three three
four four

The greatest penetration power is of which one?

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Your Answer:

gamma rays gamma rays
alpha rays alpha rays
beta rays beta rays
neutrons neutrons

Adult zebra mussel start to reproduce in___________?

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Your Answer:

spring spring
summer summer
autumn autumn
winter winter

Fleshy spore and fruiting body of fungi is_________?

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Your Answer:

red algae red algae
red fungus red fungus
mushroom mushroom
brown fungus brown fungus

Which of the following are the characteristics of isotopes of an element? (i) Isotopes of an element have same atomic masses (ii) Isotopes of an element have same atomic number (iii) Isotopes of an element show same physical properties (iv) Isotopes of an element show same chemical properties

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Your Answer:

A) (i), (iii) and (iv) A) (i), (iii) and (iv)
B) (ii), (iii) and (iv) B) (ii), (iii) and (iv)
C) (ii) and (iii) C) (ii) and (iii)
D) (ii) and (iv) D) (ii) and (iv)

Silicon is primarily used in:

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Your Answer:

Medicine Medicine
Electronics and semiconductor industry Electronics and semiconductor industry
Food preservation Food preservation
Water purification Water purification

Coniferophyta are_________?

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Your Answer:

cycads cycads
conifers conifers
fungus fungus
algae algae

The branch of electronics consisting of circuits which process digital quantities is called:

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Your Answer:

digital atoms digital atoms
digital statistics digital statistics
digital electronics digital electronics
digital magnetics digital magnetics

World no tobacco day is celebrated on:

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Your Answer:

20th January 20th January
21st May 21st May
31st May 31st May
1st May 1st May

Atherosclerosis is the:

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Your Answer:

Hardening and narrowing of arteries due to plaque
Weakening of vein walls Weakening of vein walls
Inflammation of capillaries Inflammation of capillaries
Enlargement of the heart Enlargement of the heart

Ossifying fibroma manifests as______________?

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Your Answer:

Unilocular radiolucency Unilocular radiolucency
Unilocular radio opacity Unilocular radio opacity
Multilocular radiolucency Multilocular radiolucency
Multiocular radio opacity Multiocular radio opacity
Both A & B Both A & B

An acute apical abscess is usually a result of:__________?

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Your Answer:

Periodontal pocket Periodontal pocket
Occlusal interference Occlusal interference
Necrotic pulp Necrotic pulp
Chronic gingivitis Chronic gingivitis

Sodium ions are “pumped” from a region of lower concentration to a region of higher concentration in the nerve cells of humans. This process is an example of

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Your Answer:

Diffusion Diffusion
Passive transport Passive transport
Osmosis Osmosis
Active transport Active transport

Two gametes fuse and bring the haploid nuclei in the same cell is __________?

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Your Answer:

plasmogamy plasmogamy
karyogamy karyogamy
meiosis meiosis
mitosis mitosis

The amount of oxygen (O2) present in expired air is:

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Your Answer:

0.16 0.16
0.28 0.28
0.21 0.21
0.25 0.25

Work done by a gas expanding against constant external pressure is:

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Your Answer:

$w = -P_{ext}\Delta V$ $w = -P_{ext}\Delta V$
$w = P_{ext}\Delta V$ $w = P_{ext}\Delta V$
$w = P\Delta T$ $w = P\Delta T$
$w = nRT$ $w = nRT$

diamond got brilliance due to following reason?

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Your Answer:

reflection reflection
refraction refraction
dispersion dispersion
all of the above all of the above

Oral hairy leukoplakia is seen in AIDS patients. The most likely site of appearance is_______________?

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Your Answer:

Lateral borders of tongue Lateral borders of tongue
Sublingual muosa Sublingual muosa
Soft palate Soft palate
Buccal mucosa Buccal mucosa

Primers in PCR are:

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Your Answer:

Long DNA Long DNA
Proteins Proteins
Short DNA Short DNA
RNA RNA

Predation helps to maintain balance in:

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Your Answer:

community community
population population
ecology ecology
ecosystem ecosystem

Which one of the following groups includes sexually transmitted diseases caused by bacteria only ?

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Your Answer:

A) Syphilis, gonorrhoea, chancroid A) Syphilis, gonorrhoea, chancroid
B) Syphilis, chlamydiasis, chancroid B) Syphilis, chlamydiasis, chancroid
C) Syphilis, gonorrhoea, scabies C) Syphilis, gonorrhoea, scabies
D) Syphilis, scabies, pediculosis D) Syphilis, scabies, pediculosis

The most common malignant tumor of the gingiva is _____________?

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Your Answer:

Malignant Malignant
Sarcoma Sarcoma
Fibro-sarcoma Fibro-sarcoma
squamous cell carcinoma squamous cell carcinoma

What happens if fat-soluble vitamins are taken in excess?

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Your Answer:

they cause harm they cause harm
they are readily excreted from the body they are readily excreted from the body
they don?t causes any harm they don?t causes any harm
they get stored in body they get stored in body

Neogene epoches are__________?

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Your Answer:

miocene miocene
piocene piocene
eocene eocene
a and b both a and b both

The IUPAC name of $\text{CH}_3\text{CH}_2\text{CHO}$ is:

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Your Answer:

Methanal Methanal
Ethanal Ethanal
Propanone Propanone
Propanal Propanal

If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________?

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Your Answer:

Fission reaction Fission reaction
Fusion reaction Fusion reaction
Chain reaction Chain reaction
Chemical reaction Chemical reaction

Lingual tonsils arise___________________?

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Your Answer:

As developmental anomalies As developmental anomalies
From carcinomatous transformation From carcinomatous transformation
As a result of hyperpalsia As a result of hyperpalsia
Due to repeated trauma in the area Due to repeated trauma in the area

An object is placed at a distance of $f/2$ from a convex lens. The image formed is:

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Your Answer:

At f, Real At f, Real
At 2f, Virtual At 2f, Virtual
At f, Virtual At f, Virtual
At infinity At infinity

Rapid evaluation of fungal hyphae/spores can be achieved with_______________?

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Your Answer:

Grocott Gomori Methenamine silver Grocott Gomori Methenamine silver
Hematoxylin and Eosin Hematoxylin and Eosin
KOH wet mount KOH wet mount
Peri-iodic Acid Schiff Peri-iodic Acid Schiff

Benzaldehyde undergoes Cannizzaro reaction to form:

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Your Answer:

Only benzoic acid Only benzoic acid
Benzoic acid and benzyl alcohol Benzoic acid and benzyl alcohol
Only benzyl alcohol Only benzyl alcohol
Toluene Toluene

Nutrient absorption location:

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Your Answer:

Mouth Mouth
Small intestine Small intestine
Colon Colon
Stomach Stomach

Bacteria classified on the base of__________?

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Your Answer:

shape shape
colour colour
movement movement
locomotion locomotion

The spreading of fragrance or scent in air is due to_______________?

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Your Answer:

Diffusion Diffusion
Effusion Effusion
Attraction with air Attraction with air
Low dsensity Low dsensity

The swollen degenerating epithelial cell due to acantholysis is:__________?

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Your Answer:

Anitschow cell Anitschow cell
Tzanck cell Tzanck cell
Ghost cell Ghost cell
Prickle cell Prickle cell

This drug reduces blood pressure by acting on vasomotor centers in the CNS:

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Your Answer:

Labetalol Labetalol
Clonidine Clonidine
Enalapril Enalapril
Nifedipine Nifedipine

Autoimmune disease:

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Your Answer:

Pathogen attack Pathogen attack
Self-attack Self-attack
Lupus Lupus
Rheumatoid Rheumatoid

The triad of sporangia is called following_________?

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Your Answer:

Synangium Synangium
Chamber Chamber
Bryophytes Bryophytes
Zoospores Zoospores

$|AB| = $

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Your Answer:

$|A| + |B|$ $|A| + |B|$
$|A| - |B|$ $|A| - |B|$
$|A| \times |B|$ $|A| \times |B|$
$\frac{|A|}{|B|}$ $\frac{|A|}{|B|}$

Animals are_________?

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Your Answer:

Producer Producer
Heterotrophic Heterotrophic
Autotropic Autotropic
All of these All of these

A solution of salt in water is an example of

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Your Answer:

A) Compound A) Compound
B) Element B) Element
C) Uniform mixture C) Uniform mixture
D) Non-uniform mixture (A) and Reason (R). Please read them carefully and choose the correct option.

Which of the following is a secondary cell?

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Your Answer:

A) Leclanche cell A) Leclanche cell
B) Lead storage battery B) Lead storage battery
C) Concentration cell C) Concentration cell
D) All of these D) All of these

Micronutrients are required in:

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Your Answer:

Large amounts Large amounts
Trace amounts Trace amounts
Not required Not required
Equal to macronutrients Equal to macronutrients

The vast majority of fishes are __________?

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Your Answer:

Oviparous Oviparous
Viviparous Viviparous
Ovoviviparous Ovoviviparous
None of These None of These

The functional group $-\text{COOH}$ is characteristic of:

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Your Answer:

Carboxylic acids Carboxylic acids
Alcohols Alcohols
Aldehydes Aldehydes
Ethers Ethers

Which of the following reduces pain?

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Your Answer:

vaccines vaccines
sedatives sedatives
antibiotics antibiotics
analgesics analgesics

|Pt(NH 3 ) 4 | |CuCl 4 | and |Cu(NH 3 ) 4 ||PtCl 4 | are known as

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Your Answer:

A) ionisation isomers. A) ionisation isomers.
B) coordination isomers B) coordination isomers
C) linkage isomers C) linkage isomers
D) polymerisation isomers D) polymerisation isomers

Which one of the following is polar but compound is non-polar?

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Your Answer:

H 2 O H 2 O
HCl HCl
Co 2 Co 2
NH 3 Answer NH 3 Answer

The antonym of "lethargic" is:

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Your Answer:

Tired Tired
Drowsy Drowsy
Sluggish Sluggish
Energetic Energetic

Fermentation in muscle cells produces:

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Your Answer:

Ethanol Ethanol
$CO_2$ $CO_2$
Lactic acid Lactic acid
Acetic acid Acetic acid

Metals are refined by using different methods. Which of the following metals are refined by electrolytic refining? (i) Au (ii) Cu (iii) Na (iv) K

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Your Answer:

A) (i) and (ii) A) (i) and (ii)
B) (i) and (iii) B) (i) and (iii)
C) (ii) and (iii) C) (ii) and (iii)
D) (iii)and (iv) D) (iii)and (iv)

1000 species of cichlids are found in__________?

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Your Answer:

india india
america america
north america north america
africa africa

Some virus stimulate the lysosome of host cell to produce__________?

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Your Answer:

hydrolytic enzyme hydrolytic enzyme
chemicals chemicals
phosphofructose phosphofructose
polymerase polymerase

The most prominent toxic effect associated with acetominophen use is______________?

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Your Answer:

Respiratory alkalosis Respiratory alkalosis
Haemorrhage Haemorrhage
Hepatic necrosis Hepatic necrosis
Gastric Ulceration Gastric Ulceration

The dietary carbohydrate most likely involved in etiology of dental caries in man is____________?

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Your Answer:

Glucose Glucose
Sucrose Sucrose
Dextran Dextran
Polysaccharide Polysaccharide

The lactic acid (C3H6O3) fermentation is used in the production of:

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Your Answer:

malted drinks malted drinks
beer production beer production
brown bread brown bread
many types of cheese many types of cheese

Binary fission occurs in:

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Your Answer:

Humans Humans
Plants Plants
Amoeba Amoeba
Fungi Fungi

Dimethyl ketones are usually characterized through_____________?

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Your Answer:

Tollen’s reagent Tollen’s reagent
Iodoform test Iodoform test
Schiff’s test Schiff’s test
Benedict’s reagent Benedict’s reagent

Black rhino genus is__________?

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Your Answer:

chordata chordata
aves aves
diceros diceros
passeriformes passeriformes

Swelling and redness of the orifices of minor salivary glands of the palate occurs in_________?

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Your Answer:

Nicotinic stomatitis Nicotinic stomatitis
Leukoplakia Leukoplakia
Fovea Palatine Fovea Palatine
Erythroplakia Erythroplakia

The age of fossil when C-14: C-12 in bone is one fourth of ratio in bone of living animal and half-life of C-14 is 5732 years is:

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Your Answer:

100 years 100 years
11460 years 11460 years
1000 years 1000 years
1200 years 1200 years

Free radical reactions involve:

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Your Answer:

Ionic intermediates Ionic intermediates
Carbocations Carbocations
Homolytic bond cleavage and unpaired electrons
Heterolytic cleavage Heterolytic cleavage

The equilibrium constant expression for $\text{aA} + \text{bB} \rightleftharpoons \text{cC} + \text{dD}$ is:

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Your Answer:

$\frac{[\text{A}]^a[\text{B}]^b}{[\text{C}]^c[\text{D}]^d}$
$\frac{[\text{A}] + [\text{B}]}{[\text{C}] + [\text{D}]}$
$\frac{[\text{C}]^c[\text{D}]^d}{[\text{A}]^a[\text{B}]^b}$
$[\text{A}]^a \times [\text{B}]^b \times [\text{C}]^c \times [\text{D}]^d$

Femandina is comprised of volcanic peak__________?

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Your Answer:

single single
double double
tripple tripple
fourth fourth

The quantities that we perceive by our senses are usually:

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Your Answer:

positive quantities positive quantities
digital quantities digital quantities
negative quantities negative quantities
analogue quantities analogue quantities

which rahino is larger__________?

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Your Answer:

white white
black black
yellow yellow
none none

Platyhelminthes are commonly called:

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Your Answer:

Round worms Round worms
Segmented worms Segmented worms
Ribbon worms Ribbon worms
Flatworms Flatworms

Ethanol can be converted into ethanoic acid by_________________?

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Your Answer:

Hydrogenation Hydrogenation
Hydration Hydration
Oxidation Oxidation
Fermentation Fermentation

Evaluating Your Answers

USMLE Step 1 Mock Test 4 : Question 1 of 78