USMLE Step 1 Mock Test 10 - Online MCQ Exam

The number of chromosomes in human somatic cells is:

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Your Answer:

46 46
23 23
44 44
48 48

TMV reduce the production of tobacco up to__________?

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Your Answer:

2% 2%
5% 5%
6% 6%
7% 7%

Gene flow occurs through:

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Your Answer:

Mutation Mutation
Migration between populations Migration between populations
Selection Selection
Drift Drift

Coacervates are

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Your Answer:

A) colloid droplets A) colloid droplets
B) nucleoprotein containing entities B) nucleoprotein containing entities
C) microspheres C) microspheres
D) both D) both

The major categories of plants tissues are:

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Your Answer:

compound tissues only compound tissues only
simple tissues only simple tissues only
epidermal tissues epidermal tissues
compound and simple tissues compound and simple tissues

In treating Xerostomia, Which of the following might be prescribed ?

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Your Answer:

Atropine Atropine
Neostigmine Neostigmine
Scopalamine Scopalamine
Ephedrine Ephedrine

Mitochondria in sperm are located in:

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Your Answer:

Head Head
Acrosome Acrosome
Middle piece Middle piece
Tail Tail

K2 (Cu(CN)4) which one is correct___________________?

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Your Answer:

Potassium tetra cyano cupperate Potassium tetra cyano cupperate
Co-ordination number is 2 Co-ordination number is 2
Ligand is positively charged Ligand is positively charged
Central atom is present in avionic sphere

Starch synthesis in pea seeds is an example of:

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Your Answer:

Pleiotropy Pleiotropy
Polygenic inheritance Polygenic inheritance
Codominance Codominance
Multiple alleles Multiple alleles

Which of the following statements is true about plasma________________?

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Your Answer:

It may be the first state of matter It may be the first state of matter
It is not a phase transition It is not a phase transition
It is a conductor of electricity It is a conductor of electricity
All of the above All of the above

In telephone, information is sent through wires in the form of:

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Your Answer:

cathode rays cathode rays
electromagnet waves electromagnet waves
electric signals electric signals
light light

Macracanthorhnchus species identified by zoologist___________?

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Your Answer:

hundred hundred
thousands thousands
ten ten
four four

Which of the cell give rise to lower embedded part of stalk is called __________?

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Your Answer:

Inner cell Inner cell
Outer cell Outer cell
Behinde cell Behinde cell
Stem cell Stem cell

Only one megaspore become functional and formed following __________?

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Your Answer:

Female gametophyte Female gametophyte
Malegametophyte Malegametophyte
Female sporophyte Female sporophyte
Females spores Females spores

Phenols are more acidic than alcohols because:

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Your Answer:

Resonance stabilization Resonance stabilization
Better H-bonding Better H-bonding
Larger size Larger size
Higher polarity Higher polarity

Consider the following elements: 20 Ca, 8 O, 18 Ar, 16 S, 4 Be, 2 He Which of the above elements would you expect to be in group 16 of the periodic table?

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Your Answer:

A) 20 Ca and 16 S A) 20 Ca and 16 S
B) 20 Ca and 8 O B) 20 Ca and 8 O
C) 18 Ar and 16 S C) 18 Ar and 16 S
D) 8 O and 16 S D) 8 O and 16 S

Doppler effect is associated with change in:

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Your Answer:

Frequency Frequency
Loudness Loudness
Phase Phase
Amplitude Amplitude

_______ is not an endospermic seed.

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Your Answer:

A) Pea A) Pea
B) Castor B) Castor
C) Maize C) Maize
D) Wheat D) Wheat

Slufonamides mainly interferes with the bacterial______________?

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Your Answer:

Transcription mechanisms Transcription mechanisms
Translation Translation
Ribosomal function Ribosomal function
PABA PABA

Breaking stress depends on:

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Your Answer:

Length of wire Length of wire
Radius of wire Radius of wire
Nature of material Nature of material
Shape of cross-section Shape of cross-section

First abundant grazing mammals are following years ago__________?

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Your Answer:

13+1 millions 13+1 millions
25+1 millions 25+1 millions
36+2 millions 36+2 millions
58+2 millions 58+2 millions

The time period of a simple pendulum depends on:

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Your Answer:

Mass of bob Mass of bob
Length of string Length of string
Amplitude of oscillation Amplitude of oscillation
Size of bob Size of bob

Stopping potential depends on:

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Your Answer:

Intensity Intensity
Frequency Frequency
Distance Distance
Time Time

All of the following statements are true regarding reversible cell injury, except______________?

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Your Answer:

Formation of amorphous densities in the mitochondrial matix
Diminished generation of adenosine triphosphate (ATP)
Formation of blebs in the plasma membrane
Detachment of ribosomes from the granular endoplasmic reticulum

Which of the following is order of Albugo___________?

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Your Answer:

Eumycota Eumycota
Oomycetes Oomycetes
Peronosporales Peronosporales
Albuginaceae Albuginaceae

Identify the correct statement regarding CO_______________?

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Your Answer:

it combines with H2O to form carbonic acid
it reacts with red blood cells of haemoglobin
it is powerful oxidizing agent it is powerful oxidizing agent
it is used to prepare aerated drinks it is used to prepare aerated drinks

Yellowish discolouration of oral mucous membrane, skin and sclera of eye is______________?

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Your Answer:

Pernicious anemia Pernicious anemia
Sickle cell anemia Sickle cell anemia
Chloromycin therapy Chloromycin therapy
Carotinemia Carotinemia

Choose the correct form: "The news ___ shocking."

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Your Answer:

Is Is
Are Are
Were Were
Have been Have been

Fibers are separated by following __________?

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Your Answer:

fungi fungi
bacteria bacteria
algae algae
plants plants

In the human female, meiosis II is completed:

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Your Answer:

At fertilization At fertilization
At puberty At puberty
At birth At birth
Before ovulation Before ovulation

Krebs cycle occurs in:

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Your Answer:

Mitochondrial matrix Mitochondrial matrix
Cytoplasm Cytoplasm
Cristae Cristae
Nucleus Nucleus

Bioethics deals with:

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Your Answer:

Technology only Technology only
Moral issues in biology Moral issues in biology
Economics Economics
Politics Politics

The slope of velocity-time graph gives_______?

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Your Answer:

Speed Speed
Velocity Velocity
Acceleration Acceleration
All of these All of these

Which of the following anti-epileptic agents causes the reversible side-effect of gingival hyperplasia ?

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Your Answer:

Ethosuximide Ethosuximide
Phenobarbitone Phenobarbitone
Sodium valporate Sodium valporate
None of the above None of the above

The gas used in manufacturing of urea fertilizer__________________?

1 Mark(s)

Your Answer:

C2H6 C2H6
C2H4 C2H4
C2H2 C2H2
CH4 CH4

Evaluating Your Answers

USMLE Step 1 Mock Test 10 : Question 1 of 35