__________ is an example for optical imaging technique.
a.
CLSM
b.
LCSM
c.
Both (a) and (b)
Correct Answer
d.
TEM
Step-by-Step AI Explanation
Verified Method
CLSM (Confocal Laser Scanning Microscope) and LCSM refer to optical imaging techniques used to view specimens with light. TEM (Transmission Electron Microscope) is not optical; it is an electron microscopy technique. Hence, both (a) and (b) are correct.
Q2mcq1 mark
Lens used in TEM is __________.
a.
Glass lenses
b.
Objective lens
c.
Condenser lenses
d.
Electromagnetic lens
Correct Answer
Step-by-Step AI Explanation
Verified Method
In TEM, the lenses used are electromagnetic lenses. These lenses focus and direct the electron beam. Glass lenses cannot be used because TEM works with electrons, not visible light. Therefore, the correct answer is electromagnetic lens.
Q3mcq1 mark
__________ is used to prevent infection by killing or inhibiting pathogen growth on animal tissue.
a.
Disinfectant
b.
Bacteriostatic agent
c.
Antiseptic
Correct Answer
d.
Sanitizer
Step-by-Step AI Explanation
Verified Method
An antiseptic is used on living tissues, such as animal or human tissue, to prevent infection by killing or inhibiting the growth of pathogens. Disinfectants are generally used on non-living surfaces, bacteriostatic agents only inhibit growth, and sanitizers reduce microbial load but are not specifically defined for living tissue. Hence, antiseptic is correct.
Q4mcq1 mark
Which one of the following is correct ?
a.
Apoenzyme + Holoenzyme = Coenzyme
b.
Apoenzyme + Cofactor = Holoenzyme
Correct Answer
c.
Coenzyme + Cofactor = Holoenzyme
d.
Holoenzyme + Coenzyme = Apoenzyme
Step-by-Step AI Explanation
Verified Method
An apoenzyme is the protein part of an enzyme, and when it combines with its cofactor, it forms the active holoenzyme. Therefore, Apoenzyme + Cofactor = Holoenzyme. The other options are incorrect because a coenzyme is only one type of cofactor, not the result of combining apoenzyme and holoenzyme.
Q5mcq1 mark
The minimum value of $a_w$ for the growth of the micro organisms in foods should be around __________.
a.
0.78
b.
0.99
c.
0.50
d.
0.86
Correct Answer
Step-by-Step AI Explanation
Verified Method
The minimum water activity ($a_w$) generally required for the growth of microorganisms in foods is around 0.86. Most bacteria need higher $a_w$ values, while some yeasts and molds can grow at slightly lower values. Therefore, 0.86 is the correct answer.
Q6mcq1 mark
_________ metabolites are produced in small quantities during industrial production.
a.
Tertiary
b.
Secondary
Correct Answer
c.
Neutral
d.
Primary
Step-by-Step AI Explanation
Verified Method
Secondary metabolites are produced in small quantities during industrial production. They are not directly essential for normal growth and reproduction but have important industrial and medicinal uses, such as antibiotics and pigments. Primary metabolites are produced in larger amounts and are essential for growth. Hence, secondary metabolites is correct.
Q7mcq1 mark
A gram-positive bacilli possessing metachromatic granules, showing Chinese letters arrangement are characteristic of :
a.
Bacillus anthracis
b.
Corynebacterium diphtheriae
Correct Answer
c.
Clostridium perfringens
d.
Mycobacterium tuberculosis
Step-by-Step AI Explanation
Verified Method
Corynebacterium diphtheriae is a gram-positive bacillus that shows metachromatic granules and a characteristic Chinese letters arrangement due to incomplete cell separation after division. Bacillus anthracis, Clostridium perfringens, and Mycobacterium tuberculosis do not show this typical arrangement. Therefore, the correct answer is Corynebacterium diphtheriae.
Q8mcq1 mark
Flask shaped ulcers in human intestine are related to __________.
a.
Leishmania
b.
Giardiasis
c.
Chaga’s disease
d.
Amoebiasis
Correct Answer
Step-by-Step AI Explanation
Verified Method
Flask-shaped ulcers in the human intestine are characteristic of amoebiasis caused by Entamoeba histolytica. The parasite invades the intestinal wall and produces these typical ulcers. Leishmania causes leishmaniasis, Giardia causes giardiasis, and Chagas' disease is caused by Trypanosoma cruzi. Hence, amoebiasis is correct.
Q9mcq1 mark
Diaper rash is caused by __________.
a.
Candidiasis
Correct Answer
b.
Dermatophytes
c.
Cryptococcosis
d.
Histoplasmosis
Step-by-Step AI Explanation
Verified Method
Diaper rash is caused by candidiasis, an infection due to Candida, especially Candida albicans. It commonly affects moist skin areas covered by diapers. Dermatophytes cause ringworm infections, cryptococcosis is caused by Cryptococcus, and histoplasmosis is caused by Histoplasma.
Q10mcq1 mark
Cytomegalo viruses are also called as __________.
a.
Endocrine gland virus
b.
Salivary gland virus
Correct Answer
c.
HIV
d.
Thymus gland virus
Step-by-Step AI Explanation
Verified Method
Cytomegaloviruses are also called salivary gland viruses because they commonly infect and enlarge the salivary glands. Hence, option (b) is correct. The other options are incorrect because CMV is not known as endocrine gland virus, HIV, or thymus gland virus.
🎉 10 Free Sample Solutions Completed
Unlock All 48 Questions & Solutions
Sign up free in seconds to unlock step-by-step AI answers for the remaining 38 questions.
Statement (A): Facultative anaerobes can use fermentation under anaerobic condition and carry out aerobic respiration when oxygen is present.
Statement (B): Fermentation reoxidizes NADH to $NAD^+$ by converting pyruvic acid into various organic acids.
a.
Statement (A) is false, (B) is true.
b.
Both Statement (A) and (B) are true.
c.
Both Statement (A) and (B) are false.
d.
Statement (A) is true, (B) is false.
Correct Answer & Step-by-Step Solution Locked
Sign in free to reveal the correct answer and AI explanation for this question.
