USMLE Step 1 Mock Test 2 - Online MCQ Exam

An iron rod of length $L$ and square cross-section of side $a$ is pulled parallel to its length by a force $F$ acting at the two ends. The shear stress on a plane inclined at $45^\circ$ to the axis is:

1 Mark(s)

Your Answer:

$F/2a^2$ $F/2a^2$
$F/a^2$ $F/a^2$
$F/\sqrt{2}a^2$ $F/\sqrt{2}a^2$
Zero Zero

The types of symbiosis do not include:

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Your Answer:

mutualism mutualism
symbiosis symbiosis
commensalism commensalism
predation predation

For the ellipse $\frac{x^2}{25} + \frac{y^2}{9} = 1$, the semi-major axis $a$ is:

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Your Answer:

$3$ $3$
$5$ $5$
$9$ $9$
$25$ $25$

The division of lateral meristems leads to an increase in:

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Your Answer:

transpiration transpiration
osmosis osmosis
absorption absorption
growth of parts of plants growth of parts of plants

Emigrate means to ___ a country while "immigrate" means to ___ a country:

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Your Answer:

Enter; leave Enter; leave
Stay in; leave Stay in; leave
Leave; enter Leave; enter
Neither Neither

The mass attached to a spring executes ?

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Your Answer:

Vibratory motion Vibratory motion
Rotatory motion Rotatory motion
S.H.M S.H.M
Both A and C Both A and C

If the charge passes through a wire is 0.5C then the current of 50 mA will flow in:

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Your Answer:

10 seconds 10 seconds
15 seconds 15 seconds
12 seconds 12 seconds
20 seconds 20 seconds

The degenration of annulus cells cause dropping off following _________?

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Your Answer:

Operculum Operculum
Annulus Annulus
Hydroids Hydroids
Porella Porella

Which of the following noble gases is not present in atmosphere?

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Your Answer:

Argon Argon
Helium Helium
Radon Radon
Xenon Xenon

Golgi apparatus function:

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Your Answer:

Protein synthesis Protein synthesis
Protein modification Protein modification
DNA replication DNA replication
Energy Energy

Which of the following alcohols exhibits both primary and secondary alcohol characteristics?

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Your Answer:

Methanol Methanol
Ethanol Ethanol
Isopropanol Isopropanol
Butanol Butanol

At what temperature will the speed of sound be double its value at $0^\circ C$ ($273 K$)?

1 Mark(s)

Your Answer:

$273^\circ C$ $273^\circ C$
$546^\circ C$ $546^\circ C$
$819^\circ C$ $819^\circ C$
$1092^\circ C$ $1092^\circ C$

If 5 g of $\text{CaCO}_3$ is heated, the volume of $\text{CO}_2$ at STP is:

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Your Answer:

2.24 L 2.24 L
0.56 L 0.56 L
1.12 L 1.12 L
22.4 L 22.4 L

Which of the following is true about liquids compared to solids ?

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Your Answer:

liquids have fixed shape and volume liquids have fixed shape and volume
liquids have fixed shape but no fixed volume
liquids have fixed volume but no fixed shape
liquids have neither fixed shape nor fixed volume

The metallic sound produced by engine due to the pre-ignition of fuel is called _______________?

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Your Answer:

knocking knocking
reforming reforming
cracking cracking
a and c a and c

In an electrochemical cell, oxidation occurs at the:

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Your Answer:

Cathode Cathode
Salt bridge Salt bridge
Anode Anode
Electrolyte Electrolyte

Nitrogenous base cytosine of one nucleotide forms pair with:

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Your Answer:

thymine thymine
adenine adenine
guanine guanine
cytosine cytosine

The name of the mosquito which is responsible for transmitting dengue fever is:

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Your Answer:

Culex mosquito Culex mosquito
Aedes mosquito Aedes mosquito
Anopheles mosquito Anopheles mosquito
none of above none of above

The gametophore bearing archegonia is called following__________?

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Your Answer:

Male branch Male branch
Female branch Female branch
Spores Spores
Zoospore Zoospore

Which of the following produce on the tip of sporangium __________?

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Your Answer:

spores spores
zoospore zoospore
papila papila
morels morels

Which one of the following possesses greater penetration power ?

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Your Answer:

α-rays α-rays
β-rays β-rays
γ-rays γ-rays
Neutron-rays Neutron-rays

Used as moisture retainer in many types of medicines___________?

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Your Answer:

diatomaceous earth diatomaceous earth
chlorella chlorella
algin algin
gelatin gelatin

Branches develop laterally behinde the shoot apix _________?

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Your Answer:

Dichotomous Dichotomous
Monopodial Monopodial
Lycopods Lycopods
Bryophytes Bryophytes

The situation in which no allele is dominant over the other is called:

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Your Answer:

assorted dominance assorted dominance
segregated dominance segregated dominance
complete dominance complete dominance
incomplete dominance incomplete dominance

The magnetic effect of an electric current generates a magnetic field around the current-carrying coil of a metallic wire

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Your Answer:

A) When the electric current stops flowing through the coil
B) When the coil becomes hot due to the heating effect of the electric current
C) When the electric current is flowing through the coil
D) When the coil is brought near another magnet

If a concave lens has a focal of 10 cm. At what distance should the object from the lens be placed so that it forms an image at 5 cm from the lens?

1 Mark(s)

Your Answer:

5 cm 5 cm
15 cm 15 cm
20 cm 20 cm
10 cm 10 cm

Which is not a unit of pressure:

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Your Answer:

A) Bar A) Bar
B) N/m² B) N/m²
C) Kg/m² C) Kg/m²
D) Torr D) Torr

The number of neutrons in the nucleus is called:

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Your Answer:

neutron number (N) neutron number (N)
atomic number (Z) atomic number (Z)
atomic mass number (A) atomic mass number (A)
electron number (E) electron number (E)

Positron has __________charge.

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Your Answer:

+ve +ve
-ve -ve
Neutral Neutral
None of them None of them

What is the indicator of pollution in water?

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Your Answer:

A) Amount of oxygen A) Amount of oxygen
B) Amount of hydrogen B) Amount of hydrogen
C) Amount of BOD C) Amount of BOD
D) Amount of nitrogen D) Amount of nitrogen

Dogtooth cichlids’s scientific name__________?

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Your Answer:

rhumba rhumba
cynotilapia cynotilapia
cynotilapia afra cynotilapia afra
cyprinus carpio cyprinus carpio

Which of the following birth control measures can be considered as the safest ?

1 Mark(s)

Your Answer:

A) The rhythm method A) The rhythm method
B) The use of physical barriers B) The use of physical barriers
C) Termination of unwanted pregnancy C) Termination of unwanted pregnancy
D) Sterilisation techniques D) Sterilisation techniques

If $\vec{a} \cdot \vec{b} = 0$, then the vectors are:

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Your Answer:

Perpendicular Perpendicular
Parallel Parallel
Equal Equal
Anti-parallel Anti-parallel

When common salt is dissolved in water ?

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Your Answer:

Boiling point of water decrease Boiling point of water decrease
Boiling point of water increase Boiling point of water increase
Boiling point of water remains same Boiling point of water remains same
None of the above None of the above

The autonomic nervous system controls:

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Your Answer:

Voluntary movements Voluntary movements
Involuntary organs Involuntary organs
Skeletal muscles Skeletal muscles
Conscious actions Conscious actions

Which of the following is NOT a function of the liver?

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Your Answer:

Production of bile Production of bile
Secretion of Insulin Secretion of Insulin
Detoxification Detoxification
Urea formation Urea formation

The catalytic converter fits into automobiles to reduce emission of:

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Your Answer:

Particulate matter Particulate matter
Noise Noise
Poisonous gases Poisonous gases
Ozone Ozone

Are mainly used in phage studies__________?

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Your Answer:

T2 T2
T4 T4
T3 T3
a and b both a and b both

Sickle cell anemia occurred when changes in molecules__________?

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Your Answer:

carbon carbon
plasma plasma
hemoglobin hemoglobin
cells cells

The values of the output of the OR gate are always following the truth table of:

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Your Answer:

AND operation AND operation
NAND operation NAND operation
OR operation OR operation
NOT operation NOT operation

Because of its ability to combine with both oxygen and nitrogen aluminium metal is used_____________?

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Your Answer:

As nitrometer As nitrometer
To remove air bubbles from molten metal To remove air bubbles from molten metal
To produce alloy To produce alloy
As insulator As insulator

Hormone definition:

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Your Answer:

Protein only Protein only
Signaling molecule Signaling molecule
Enzyme Enzyme
Neurotransmitter Neurotransmitter

The last period of mesozoic era is__________?

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Your Answer:

creatceous creatceous
cenozoic era cenozoic era
paleocene paleocene
eocene eocene

Eight spherical rain drops of the same mass and radius are falling down with a terminal speed of $5 cm/s$. If they coalesce to form one big drop, the new terminal speed will be:

1 Mark(s)

Your Answer:

$10 cm/s$ $10 cm/s$
$5 cm/s$ $5 cm/s$
$20 cm/s$ $20 cm/s$
$40 cm/s$ $40 cm/s$

As compare to iron, aluminum has:

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Your Answer:

higher tendency to oxidize higher tendency to oxidize
less tendency to oxidize less tendency to oxidize
equal tendency to oxidize equal tendency to oxidize
all of above all of above

The 'WFP' stands for:

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Your Answer:

Wild Food Program Wild Food Program
World Food Program World Food Program
Wild Fire Protection Wild Fire Protection
Wild Fauna Protection Wild Fauna Protection

If east, west, north, south, up and down are representing the direction of unit vectors, then east x south has the direction along_____________?

1 Mark(s)

Your Answer:

West West
North North
Down Down
Up Up

Dicots have following species __________?

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Your Answer:

199350 199350
3000 3000
3390 3390
4490 4490

In humans the pairs of cranial nerves are:

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Your Answer:

31 31
13 13
12 12
15 15

The magnetic effect of electric current was discovered by:

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Your Answer:

Maxwell Maxwell
Darwin Darwin
Oersted Oersted
Newton Newton

Percent yield calculation:

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Your Answer:

Actual ÷ Theoretical Actual ÷ Theoretical
(Actual/Theoretical) × 100 (Actual/Theoretical) × 100
Theoretical/Actual Theoretical/Actual
(Theoretical-Actual)/Actual (Theoretical-Actual)/Actual

Bernoulli's principle is a statement of conservation of:

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Your Answer:

Mass Mass
Energy Energy
Momentum Momentum
Angular Momentum Angular Momentum

What is the effect of pressure on the speed of sound in a gas at constant temperature?

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Your Answer:

Increases Increases
Decreases Decreases
No effect No effect
Varies with $P^2$ Varies with $P^2$

megaloblastic anaemia occurs due to________________?

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Your Answer:

Iron deficiency Iron deficiency
Folate deficiency Folate deficiency
Vitamin C deficiency Vitamin C deficiency
Protein deficiency Protein deficiency

The subatomic particle that has negative charge is___________?

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Your Answer:

Electron Electron
Proton Proton
Neutron Neutron
None of These None of These

In human adult females oxytocin

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Your Answer:

A) stimulates pituitary to secrete vasopressin
B) causes strong uterine contractions during parturition
C) is secreted by anterior pituitary C) is secreted by anterior pituitary
D) stimulates growth of mammary glands. D) stimulates growth of mammary glands.

Which of the following exerts its major systemic pharmacological action when administered orally_____________?

1 Mark(s)

Your Answer:

Insulin Insulin
Chloral hydrate Chloral hydrate
Procaine Procaine
Streptomycin Streptomycin

According to Oparin, which one of the following was not present in the primitive atmosphere of the earth ?

1 Mark(s)

Your Answer:

A) Methane A) Methane
B) Oxygen B) Oxygen
C) Hydrogen C) Hydrogen
D) Water vapour D) Water vapour

Ecology is the study of the relationship between the organism and their:

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Your Answer:

climate climate
weather weather
plants plants
environment environment

Most common cyst in oral region is:__________?

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Your Answer:

Medial cyst Medial cyst
Radicular cyst Radicular cyst
Follicular cyst Follicular cyst
Naso labial cyst Naso labial cyst

Cocaine is obtained from

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Your Answer:

A) Erythroxylon coca A) Erythroxylon coca
B) Papaver somniferum B) Papaver somniferum
C) Atropa belladona C) Atropa belladona
D) Dature stramonium D) Dature stramonium

Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of the reaction involved? (i) Displacement reaction (ii) Precipitation reaction (iii) Combination reaction (iv) Double displacement reaction

1 Mark(s)

Your Answer:

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

DDT is:

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Your Answer:

Fertilizer Fertilizer
Pesticide Pesticide
Herbicide Herbicide
Fungicide Fungicide

The relation between Torque ($\tau$) and Angular Momentum ($L$) is:

1 Mark(s)

Your Answer:

$\tau = L \times t$ $\tau = L \times t$
$\tau = I L$ $\tau = I L$
$\tau = dL/dt$ $\tau = dL/dt$
$\tau = dL/d\theta$ $\tau = dL/d\theta$

The filament with prostate and vertical system are called __________?

1 Mark(s)

Your Answer:

heterotrichous heterotrichous
pseudoparenchymatous pseudoparenchymatous
coenocytic coenocytic
none none

What is the color of nitrogen dioxide?

1 Mark(s)

Your Answer:

colorless colorless
pink pink
brown brown
reddish brown reddish brown

Amyloid material can be best diagnosed by___________________?

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Your Answer:

Polarized microscopy Polarized microscopy
Electron microscopy Electron microscopy
X-ray crytallography X-ray crytallography
Scanning electron miscroscopy Scanning electron miscroscopy

Alkanes undergo primarily:

1 Mark(s)

Your Answer:

Addition reactions Addition reactions
Substitution reactions Substitution reactions
Elimination reactions Elimination reactions
Polymerization Polymerization

Laplace's correction to the speed of sound formula involves the ratio of specific heats $\gamma$. The formula is:

1 Mark(s)

Your Answer:

$\sqrt{\gamma P / \rho}$ $\sqrt{\gamma P / \rho}$
$\sqrt{P / \rho}$ $\sqrt{P / \rho}$
$\sqrt{P \gamma \rho}$ $\sqrt{P \gamma \rho}$
$\sqrt{\rho / \gamma P}$ $\sqrt{\rho / \gamma P}$

The rate of flow of electric charge through any cross-sectional area is called:

1 Mark(s)

Your Answer:

energy energy
light light
heat heat
current current

Hormones responsible for female secondary sexual characters are progesterone and:

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Your Answer:

estrogen estrogen
testosterone testosterone
thyroxine thyroxine
gonadotropic gonadotropic

Organism that feed on herbs__________?

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Your Answer:

cannibalism cannibalism
omnivores omnivores
carnivores carnivores
herbivores herbivores

Evaluating Your Answers

USMLE Step 1 Mock Test 2 : Question 1 of 72