USMLE Step 1 Mock Test 1 - Online MCQ Exam

Oncoviruses shape is__________?

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Your Answer:

rod rod
circular circular
spherical spherical
random random

Thoatherium subfamily is__________?

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Your Answer:

litopterma litopterma
animalia animalia
proterotherinnae proterotherinnae
chordata chordata

We study about matter, energy and their interaction in:

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Your Answer:

Biology Biology
Physics Physics
Chemistry Chemistry
Economics Economics

Which mode of heat transfer does not require a material medium?

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Your Answer:

Conduction Conduction
Convection Convection
Radiation Radiation
Advection Advection

The Larvel stage of brook lampreys last for about__________ years?

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Your Answer:

1 1
2 2
3 3
4 4

Root pressure is maximum during:

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Your Answer:

Night Night
Afternoon Afternoon
Evening Evening
Midday Midday

The focal length of a plane mirror is:

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Your Answer:

Zero Zero
Positive Positive
Infinity Infinity
Negative Negative

The size of colloidal particles ranges between

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Your Answer:

A) 10 -7 – 10 -8 cm A) 10 -7 – 10 -8 cm
B) 10 -9 – 10 -11 cm B) 10 -9 – 10 -11 cm
C) 10 -4 – 10 -7 cm C) 10 -4 – 10 -7 cm
D) 10 -2 – 10 -3 cm D) 10 -2 – 10 -3 cm

Parturition is induced by a complex neuroendocrine mechanism involving:

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Your Answer:

Vasopressin Vasopressin
Prolactin Prolactin
Relaxin Relaxin
Oxytocin Oxytocin

Which RNA carries amino acids to the ribosome?

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Your Answer:

mRNA mRNA
rRNA rRNA
tRNA tRNA
hnRNA hnRNA

When light passes through a prism it deviates from its original path because of:

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Your Answer:

reflection reflection
refraction refraction
defraction defraction
acoustics acoustics

A noun clause can function as:

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Your Answer:

Only an adjective Only an adjective
Only an adverb Only an adverb
Subject, object, or complement Subject, object, or complement
Only a modifier Only a modifier

Which interaction is (-,-)?

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Your Answer:

Predation Predation
Competition Competition
Amensalism Amensalism
Mutualism Mutualism

The value of the universal gas constant $R$ is:

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Your Answer:

$8.314 \text{ J mol}^{-1}\text{K}^{-1}$ $8.314 \text{ J mol}^{-1}\text{K}^{-1}$
$4.184 \text{ J mol}^{-1}\text{K}^{-1}$ $4.184 \text{ J mol}^{-1}\text{K}^{-1}$
$1.987 \text{ J mol}^{-1}\text{K}^{-1}$ $1.987 \text{ J mol}^{-1}\text{K}^{-1}$
$6.022 \text{ J mol}^{-1}\text{K}^{-1}$ $6.022 \text{ J mol}^{-1}\text{K}^{-1}$

Acid rain is primarily caused by:

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Your Answer:

Carbon dioxide Carbon dioxide
Ozone Ozone
Methane Methane
Sulfur dioxide and nitrogen oxides Sulfur dioxide and nitrogen oxides

First experimental proof for semi-conservative DNA replication was shown in

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Your Answer:

A) Streptococcus pneumoniae A) Streptococcus pneumoniae
B) Escherichia coli B) Escherichia coli
C) Neurospora crassa C) Neurospora crassa
D) Rattus rattus. D) Rattus rattus.

Parallel venation is found in:

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Your Answer:

Dicots Dicots
Monocots Monocots
Gymnosperms Gymnosperms
Bryophytes Bryophytes

Polalo viridis genus is__________?

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Your Answer:

polalo polalo
eunicida eunicida
polychaeta polychaeta
insecta insecta

Which of the most effective for drug asymptomatic amoebic cysts ?

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Your Answer:

Metronidazole Metronidazole
Diloxanide furoate Diloxanide furoate
Quinidochlor Quinidochlor
Furazolidone Furazolidone

Commonest mode of inheritance of Von Willebrand’s disease is______________?

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Your Answer:

Codominant Codominant
Autosomal dominan Autosomal dominan
Autosomal recessive Autosomal recessive
X-Linked recessive X-Linked recessive

Hirodinea phylum is__________?

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Your Answer:

animalia animalia
annelida annelida
insecta insecta
a and b both a and b both

The solution remaining after the formation of crystals is called ___________________?

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Your Answer:

Mother liquor Mother liquor
Dilute solution Dilute solution
Residue Residue
both A & B both A & B

Pollutants have adverse effect over_________________?

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Your Answer:

Biosphere Biosphere
Ecosystem Ecosystem
Both a & b Both a & b
Hydrosphere Hydrosphere

Sildenafil is inhibitor of_______________?

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Your Answer:

cAMP cAMP
cGMP cGMP
PDE-5 PDE-5
PGI2 PGI2

A football is kicked at 45 degrees with horizontal with K.E of E. Its K.E. at highest point is

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Your Answer:

Zero Zero
E/2 E/2
E E
E/(2) 1/2 E/(2) 1/2

The theory which states that transpiration pull is responsible for carrying water upward through the xylem is called:

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Your Answer:

cortex-xylem theory cortex-xylem theory
cohesion-pressure theory cohesion-pressure theory
cohesion-tension theory cohesion-tension theory
pressure-tension theory pressure-tension theory

DDT is:

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Your Answer:

Fertilizer Fertilizer
Pesticide Pesticide
Herbicide Herbicide
Fungicide Fungicide

In the Thomson’s model of atom, which of the following statements are correct? (i) The mass of the atom is assumed to be uniformly distributed over the atom (ii) The positive charge is assumed to be uniformly distributed over the atom (iii) The electrons are uniformly distributed in the positively charged sphere (iv) The electrons attract each other to stabilise the atom

1 Mark(s)

Your Answer:

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

The boiling point of naphtha is:

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Your Answer:

below 20 °C below 20 °C
35 °C to 70 °C 35 °C to 70 °C
70 °C to 120 °C 70 °C to 120 °C
170 °C to 250 °C 170 °C to 250 °C

The intensity of sound is $I$. If the amplitude is doubled, the new intensity is:

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Your Answer:

2I 2I
4I 4I
I/2 I/2
I I

d-block elements are also called as __________?

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Your Answer:

Inner Transition Inner Transition
Outer Transition Outer Transition
Alkali Metals Alkali Metals
Both B & C Both B & C

Which of the following does not give Borax bead test ?

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Your Answer:

Cu Cu
Cr Cr
Ni Ni
A1 A1

Easy fatigability of muscles seen in______________?

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Your Answer:

Epilepsy Epilepsy
MPDS MPDS
Myasthenia gravis Myasthenia gravis
Cerebral palsy Cerebral palsy

Which of the following grow on the green patches of velvety in shady damp places__________?

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Your Answer:

Riccia Riccia
Porella Porella
Funaria Funaria
Gametophyte Gametophyte

Primary amyloidosis occurs in _________________?

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Your Answer:

Multiple myeloma Multiple myeloma
Tuberculosis Tuberculosis
Hodgkin’s diseaes Hodgkin’s diseaes
Chronic osteomyelitis Chronic osteomyelitis

Villi are present in the:

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Your Answer:

Stomach Stomach
Large intestine Large intestine
Esophagus Esophagus
Small intestine Small intestine

Smooth muscles are found in:

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Your Answer:

Internal organs Internal organs
Skeleton Skeleton
Heart only Heart only
Bones Bones

Total distance travelled by a bob of the simple pendulum in one vibration is equal to________________?

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Your Answer:

Amplitude Amplitude
Square of the amplitude Square of the amplitude
2 x amplitude 2 x amplitude
4 x amplitude 4 x amplitude

S.hineana status is___________?

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Your Answer:

endangered endangered
extinct extinct
normal normal
over population over population

Which fundamental force is thought to become unified with the Electroweak force at energies of $10^{15}$ GeV?

1 Mark(s)

Your Answer:

Gravitational Gravitational
Frictional Frictional
Strong Nuclear Strong Nuclear
Centrifugal Centrifugal

Evaluating Your Answers

USMLE Step 1 Mock Test 1 : Question 1 of 40