Stomata open due to _________ of K into the guard cells from the surrounding epidermis?
A. Diffusion
B. Active transport
C. Osmosis
D. All of these
Category: Biology Mcqs
Which of the following fish drink large amount of sea water and excrete concentrated urine resulting in maximum salt excretion and minimal water loss??
A. Hagfish
B. Fresh water fishes
C. Bony fishes
D. None of these
Which one of the following syndrome is the result of meiotic non dysjunction??
A. Klinefelters syndrome
B. Turners syndrome
C. Downs syndrome
D. All of these
Ribonucleo-protein particles are the name of__________??
A. DNA
B. Nucleus
C. Eukaryotic ribosomes
D. RNA
In human body 99% of total mass is formed of_____________??
A. 16 Bio-elements
B. 12 Bio-elements
C. 10 Bio-elements
D. 6 Bio-elements
Which of the following statement is incorrect about RNA_________________??
A. The pentose sugar in it is Ribose.
B. It contains Adenine Guanine Thymine and Cytosine
C. It is present in the nucleoli
D. It may be folded back on itself to give double helical characteristics.
In which of the following location enzymes controlling cellular respiration are present____________??
A. Nucleus
B. Chlorophast
C. Milochondria
D. Ribosome
What happens during muscle contraction to the length of each myosin and action filament??
A. Z- lines get closer
B. A band becomes short
C. 1 band elongates
D. There is no change in sarcomere
Carbon atom is_____________??
A. Monovalent
B. Divalent
C. Trivalent
D. Tetravalent
Branch of biology which deals with the study of chemical components and chemical processes in living organisms is called________________??
A. Molecular biology
B. Physiology
C. Biochemistry
D. Atomic biology
