INTRODUCTION OF ANTIGENS Antigens are any substance which when introduced into the body parenterally can induce the formation of an antibody with which reaction occurs specifically and in observable manner. It can also be defined as any substances that gets identified or recognized by B cell receptors (Ig) and T-cell receptors (along with the major … Read more
INTRODUCTION Plant tissues are categorized into three types. They are meristematic tissues, permanent tissues and secretary tissues. These tissues are further grouped into various types. Among them, permanent tissues are divided as simple permanent tissues and complex permanent tissues. Simple permanent tissues are formed of group of cells which are all alike in origin, form … Read more
Here, we present some of the MCQs of biology for students of different medical fields. It may be helpful to those students who are determined to achieve and fulfill their aim in future. Bulliform cells are present in Adaxial side of dorsiventral leaf Abaxial side of isobilateral leaf Adaxial side of grass leaf Abaxial side … Read more
Here, we present some of the MCQs of biology for students of different medical fields. It may be helpful to those students who are determined to achieve and fulfill their aim in future. 1. Which of the following statements regarding universal rules of nomenclature is wrong? The first word in biological name represents the genus. … Read more
Here, we present some of the MCQs related to physics that can be helpful for the students who are preparing for various medical subjects like MBBS, BDS, nursing, engineering and so on. 1. Which of the following pairs of physical quantities does not have same dimensional formula? work and torque angular momentum and Planck’s constant … Read more
Introduction Smallest micro organisms Free living in nature Can grow in cell free medium Causes human infection M. pneumoniae: Pneumonia Ureaplasma urealyticum: non-gonococcal urethritis M. hominis and M. gentalium: genital tract infections. Cell wall absent Highly pleomorphic in nature Has no fixed shape and size Absence of cell wall precursors that are Muramic acid diaminopimelic … Read more
Introduction The combination of antigens (Ag) and antibodies (Abs) occur specifically and in observable manner. There is various usefulness of this type of reaction. Some of them are: A basis for the formation of antibody mediated immunity Helps generally during the cases of infectious diseases. Besides, in tissue injury related to some types of hypersensitivity … Read more
Introduction Formerly known as Pasteurella pestis. Falls in family enterobacteriaceae. Discovered in Honkong in 1894 AD by Yersin and Kitasato. Important medical species are Y.pestis, Y. pseudotuberculosis and Y. enterocolitica. Y. pestis responsible for causing plague whereas Y. pseudotuberculosis is a primary pathogen of rodents. Similarly, Y. enterocolitica causes enteric and systemic diseases. These diseases … Read more
S.N Anthrax Bacilli S.N Anthracoid Bacilli 1. All are non-motile. 1. Generally, are motile. 2. Presence of capsule. 2. Absence of capsule. 3. Growth occurs in long chain form. 3. Growth occurs in short chain form. 4. Medusa head colony in nutrient agar. 4. Medusa head colony absent. 5. Growth in penicillin agar is not … Read more
S.N Streptococcus pneumoniae S.N Viridans streptococci 1. Are capsulated. 1. Are non-capsulated. 2. Shape is lanceolate or flame shaped. 2. Shape is oval or round cells. 3. Give Positive quellung test. 3. Give negative quellung test. 4. On blood agar, dome-shaped initially, later on appear as draughtsman colonies. 4. On blood agar, dome-shaped. … Read more