A. Specific enzyme can transform only a specific substrate
B. Active site of an enzyme is a non flexible structure
C. Active site does not change before during or even after the reaction
D. It explains the mechanism of every chemical reaction
Related Mcqs:
- Lock and Key model was proposed by______________?
A. Emil Fischer
B. Koshland
C. Robin Williams
D. Rudolph Virchow - Which statement is incorrect for pasteurization?
A. It is used to preserve yogurt and milk
B. It was developed by Louis Pasteur.
C. It involves heating the substance at high temperature for just few sec.
D. It can be used to preserve vegetables and meat. - Which of the following statement is incorrect about antibiotics?
A. They are used against microorganisms
B. They are always effective against bacteria
C. They are used in diseases like tuberculosis and pneumonia
D. They are derived from bacteria only - Which of the following statement about AIDS is incorrect:
A. is a host specific disease
B. An infected mother cannot pass the virus to her baby.
C. Results in enlargement of lymph nodes
D. Can be prevented. - Which of the following statement is incorrect regarding germ theory of diseases postulated by Robert Koch_____________?
A. A specific organism can always be found in association with a given disease
B. The organism can be isolated and grown in pure culture in the laboratories
C. The pure culture cannot produce the disease when inoculated into susceptible animal however the causative organism isolated from pure culture can do so.
D. It is possible to recover the organism in pure culture from the experimentally infected animals - Which of the following statement about plants is incorrect?
A. All are eukaryotes
B. They are multicellular.
C. Non-motile organisms
D. They Are heterotrophes - Which of the following statement about alternation of generation in bryophytes is incorrect?
A. It involves alternation of morphologically different generations
B. Their gametophyte is independent while sporophyte depends upon gametophyte for nutrition.
C. Both the gametophyte and sporophytes are haploid generations thus can produce haploids gametes to continue the diploid number on fertilization
D. Spore formation occurs through meiosis - Which of the following statement about dicots is incorrect _________________?
A. They have 4 or 5 sepals and petals or their multiple.
B. They have parallel vein pattern on their leaves
C. They are both herbaceous and woody
D. Vascular bundles are ring shaped in their stems. - Which of the following statement about the head of a chlorophyll molecule is incorrect?
A. It is a porphyrin ring or tetrapyrrole ring structure
B. It is flat, square and light absorbing
C. Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.
D. It is hydrophobic - Which of the following statement about osteoporosis is incorrect.
A. It results from estrogen deficiency.
B. Bone eating process takes over bone formation process.
C. There is reduction of bone mass and change in chemical composition of the matrix
D. It is common in old age.
