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476 questions

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113
1
no
2017-04-27 09:49:51 -0500 Aim4u

Which one of the following statements about the E. coli cells shown in the photomicrograph below is true?

image description

a. They can result from treatment with penicillin

b. Treatment of the parent E. coli with lysozyme has no effect

c. They are osmotically stable

d. They are commonly referred to as endospore

e. They have formed cell walls but have become coccoid

smriti gravatar image smriti
30
1
no
2017-04-26 20:18:28 -0500 Ruchika

Streptococcus pneumoniae are characterized by

Monali Meshram gravatar image Monali Meshram
93
2
3
2017-04-20 04:41:50 -0500 alur

The etiologic agent, shown in the photomicrographs below, is

image description

a. P. falciparum

b. Clonorchis sinensis

c. Diphyllobothrium latum

d. T. solium

e. T. saginata

nichit kapadia gravatar image nichit kapadia
11
1
no
2017-04-19 23:30:02 -0500 Gaurishankar Pandit flag of Nepal

Which of the following statement regarding the given parasite is correct

image description

a. Habitat of the given organism is jejunum and ileum

b. Length is around 1-2 metre

c. Triclobendazole is the drug of choice

d. Eggs become infective after 10 days

diksha gravatar image diksha
32
4
4
2017-04-19 04:16:36 -0500 Gaurishankar Pandit flag of Nepal

Identify the organism in the given image of gram stain

image description

a. Neisseria b. Staph aureus c. Streptococcus d. Haemophillus influenza

diksha gravatar image diksha
174
1
1
2017-04-19 02:09:57 -0500 yogesh

The following diagram illustrates the amplification of DNA by the polymerase chain reaction (PCR).

There are at least four points in the PCR process (A–D) that are critical to the reaction.

image description

The Southern blot detection system for amplified PCR products fails to function. Which one of the following would be affected?

a. A

b. B

c. C

d. D

Aefya Droalia gravatar image Aefya Droalia
51
1
no
2017-04-18 08:03:35 -0500 Gaurishankar Pandit flag of Nepal

The photomicrograph below shows fine fibrils (labeled F) in an ameba. These structures are

image description

a. Termed amebic microtubules

b. Analogous to actin in the cells of higher forms of life

c. Primarily of glycoprotein composition

d. Not involved in cell motility

e. Inactive at 37°C (98.6°F)

Monali Meshram gravatar image Monali Meshram
94
no
no
2017-04-10 08:07:23 -0500 Admin

An AIDS patient presents to his primary care physician with a 2-week history of watery, nonbloody diarrhea.

This stool revealed an organism which can be seen in the figure below. The most likely diagnosis is

image description

a. Cyclospora

b. Cryptosporidium

c. Enterocytozoon

d. Yeast

e. Acid-fast bacilli

rivu gravatar image rivu
96
no
no
2017-04-07 06:33:03 -0500 Admin

An AIDS patient complains of headaches and disorientation.

image description

A clinical diagnosis of Toxoplasma encephalitis is made and Toxoplasma cysts were observed in a brain section (see figure below). Which one of the following antibody results would be most likely in this patient?

a. IgM nonreactive, IgG nonreactive

b. IgM nonreactive, IgG reactive (low titer)

c. IgM reactive (low titer), IgG reactive (high titer)

d. IgM reactive (high titer), IgG reactive (high titer)

e. IgM reactive (high titer), IgG nonreactive

ranjan gravatar image ranjan
119
no
no
2017-04-06 06:27:56 -0500 Admin

A female infant was born prematurely after rupture of membranes and, within 1 day of birth, developed a fever and died.

The pregnant mother had been cultured just prior to the birth of her child and her vaginal culture revealed group B streptococci (S. agalactiae). Which one of the pictured tests shown in the figure below would provide the most rapid and useful information?

image description

A. Direct Gram stain demonstrating Streptococcus agalactiae in CSF of infected neonate (μ1000).

B. Blood agar plate demonstrating diffuse β-hemolysis due to group B streptococci from CSF.

C. Brain at autopsy demonstrating acute hemorrhagic response to Streptococcus agalactiae.

D. Brain section with blood vessel occluded by group B streptococci.

Aefya Droalia gravatar image Aefya Droalia
65
4
1
2017-03-29 05:54:04 -0500 Pauline

Babesiosis, as observed in the figure below, is a tick-borne disease resulting in a febrile illness. Infection with Babesia is most commonly observed in

image description

a. Transfusion recipients

b. Patients without a spleen

c. AIDS patients

d. Foresters

e. Transplant recipients

Pauline gravatar image Pauline
51
1
2
2017-03-28 08:23:32 -0500 doctor84

The object designated by the arrow in the photomicrograph below is

image description

a. An encapsulated yeast

b. A thick-walled spore

c. A spherule

d. A hyphal strand

e. A macroconidium

Divya aggarwal gravatar image Divya aggarwal
64
no
no
2017-03-22 00:42:32 -0500 Admin

A freeze-fractured E. coli is shown below. The elliptical structure at the left is the

image description

a. Plasma membrane

b. Cell wall

c. Cell capsule

d. Cytoplasm

e. Flagellum

Medha gravatar image Medha

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