Multiple Choice QuestionsWhich of the following are found in extreme saline
conditions?
Archaebacteria
Eubacteria
Cyanobacteria
Mycobacteria
A.
Archaebacteria
A temporary endocrine gland in the human body is
Pineal gland
Corpus cardiacum
Corpus luteum
Corpus allatum
C.
Corpus luteum
Corpus luteum is the temporary endocrine structure formed in the ovary after ovulation. It is responsible for the release of the hormones like progesterone, oestrogen etc.
Select the mismatch :
Frankia – Alnus
Rhodospirillum – Mycorrhiza
Anabaena – Nitrogen fixer
Rhizobium – Alfalfa
B.
Rhodospirillum – Mycorrhiza
The hepatic portal vein drains blood to liver from
Heart
Stomach
Kidneys
Intestine
D.
Intestine
Which one of the following statements is correct with reference to enzymes?
Apoenzyme = Holoenzyme + Coenzyme
Holoenzyme = Apoenzyme + Coenzyme
Coenzyme = Apoenzyme + Holoenzyme
Holoenzyme = Coenzyme + Cofactor
B.
Holoenzyme = Apoenzyme + Coenzyme
Which cells of 'Crypts of Lieberkuhn' secrete antibacterial lysozyme?
Argentaffin cells
Paneth cells
Zymogen cells
Kupffer cells
B.
Paneth cells
– Kupffer-cells are phagocytic cells of liver.
– Zymogen cells are enzyme producing cells.
– Paneth cell secretes lysozyme which acts as anti-bacterial agent.
– Argentaffin cells are hormone producing cells.
Which of the following options gives the correct sequence of events during mitosis?
Condensation - nuclear membrane disassembly
- crossing over - segregation - telophase
Condensation - nuclear membrane disassembly
-arrangement at equator - centromere
division - segregation - telophase
Condensation - crossing over - nuclear
membrane disassembly - segregation -
telophase
Condensation - arrangement at equator -
centromere division - segregation -
telophase
B.
Condensation - nuclear membrane disassembly
-arrangement at equator - centromere
division - segregation - telophase
The correct sequence of events during mitosis would
be as follows
(i) Condensation of DNA so that chromosomes become visible occurs during early to mid-prophase.
(ii) Nuclear membrane disassembly begins at late prophase or transition to metaphase.
(iii) Arrangement of chromosomes at equator occurs during metaphase, called congression.
(iv) Centromere division or splitting occurs during anaphase forming daughter chromosomes.
Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature?
(a) They do not need to reproduce
(b) They are somatic cells
(c) They do not metabolize
(d) All their internal space is available for oxygen
transport
Only (d)
Only (a)
(a), (c) and (d)
(b) and (c)
A.
Only (d)
In Human RBCs, nucleus degenerates during maturation which provide more space for oxygen carrying pigment (Haemoglobin). It lacks most of the cell organelles including mitochondria so respires anaerobically
Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
Bacillus
Pseudomonas
Mycoplasma
Nostoc
C.
Mycoplasma
Which of the following is made up of dead cells?
Xylem parenchyma
Collenchyma
Phellem
Phloem
C.
Phellem
Cork cambium undergoes periclinal division and cuts off thick walled suberised dead cork cells towards outside and it cuts off thin walled living cells i.e., phelloderm on inner side.
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