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WorksheetsBRAIN TEASERS BIO FOR HIGHER CLASS
Total questions: 20
Worksheet time: 10mins
Identify the incorrect statement about Double circulation.
(a) It occurs only in mammals
(b) It occurs in all vertebrates
(c) It is composed of the systemic circulation
(d) It is composed of pulmonary circulation
Pick the most appropriate statement(s) as part of the explanation for this statement – “Adult human RBCs are enucleated”.
I. Their internal space is available for oxygen transport
II. They are somatic cells
III. They do not need to reproduce
IV. They do not metabolise
(a) Only (I)
(b) Only (II)
(c) (I), (III) and (IV)
(d) (III) and (IV)
Blood pressure in the pulmonary artery is
(a) Same as that in the aorta
(b) Less than that in vena cava
(c) More than that in the carotid
(d) More than that in the pulmonary vein
Oxygenated blood in the cardiac system
(a) leaves from the right side of the heart
(b) leaves from the left side of the heart
(c) enters lungs from the heart
(d) does not leave the lungs
This has a smaller intestine
(a) carnivore
(b) herbivore
(c) both (a) and (b)
(d) none of the above
Which of these substances is transported by the blood plasma?
(a) Carbon dioxide
(b) Nitrogenous waste
(c) Food
(d) All of the above
In photosynthesis, the chlorophyll is used for
(a) No function
(b) reduction of carbon dioxide
(c) breaking down the water molecule
(d) absorbing light
The enzymes found in intestinal juice finally convert
(a) fats into fatty acids and glycerol
(b) proteins to amino acids
(c) complex carbohydrates into glucose
(d) all of these
The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements is involved in this reaction?
Magnesium & chlorine
Manganese & chlorine
Manganese & potassium
magnesium & molybdenum
Flowers are unisexual in
Onion
Pea
Cucumber
China rose
How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments
6
8
7
5
High value of BOD (biochemical oxygen demand) indicates that:
Water is higly polluted
Water is less polluted
Consumption of organic matter in the water is higher by the microbes
Water is pure
Gastric juice of infants contain
nuclease, pepsinogen, lipase,
pepsinogen, lipase, rennin
amylase, rennin, pepsinogen
maltase, pepsinogen, rennin
DNA is not present in
Ribosomes
Mitochondria
Nucleus
Chloroplast
Nuclear envelope is a derivative of:
membrane of golgi coplex
microtubules
RER
SER
HIV that causes AIDS , first starts destroying :
Leucocytes
Helper T- lymphocytes
Thrombocytes
B-lymphocytes
Removal of proximal convoluted tubules from the nephron will result in
more concentrated urine
No change in quality & quantity of urine
no urine formation
more diluted urine
The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are
grana
stroma lamellae
stroma
cristae
The chromosomes in which centromere is situated close to one end are
Acrocentric
Telocentric
sub-metacentric
metacentric
Which of the following animals is not viviparous?
elephant
platypus
whale
flying fox
