Plants are autotrophic and synthesize their own food by the process of photosynthesis using simpler inorganic raw materials (CO, and water) in presence of light. The overall reaction is given below. \[6C{{O}_{2}}+12{{H}_{2}}O\xrightarrow[Chlorophyll]{Light}{{C}_{6}}{{H}_{12}}{{O}_{6}}+6{{H}_{2}}O+6{{O}_{2}}\]This reaction takes place in which of the labelled parts of the chloroplast?
Which of the following shows the correct positions of the phosphate (P), sugar (S) and base molecules in the line diagrams representing structure of DNA?
The given flowchart represents the hierarchy of various taxonomic categories. Identify the missing categories (a, b and c) and select the correct statements regarding these.
(i) 'a' is the taxonomic category which contains a number of related genera.
(ii) Examples of category 'b are Monocotyledoneae, Dicotyledoneae
(iii) 'c' represents the basic unit of taxonomic hierarchy.
(iv) Examples of category 'c' are Fungi, Monera, Protista, etc.
One hormone is used to speed up the mailing process in barley, another is used to promote flowering in pineapple, while the third helps in the delay of leaf senescence. These are respectively
A scientist discovered that a protein associated with the plasma membrane of a cultured animal cell disappeared from the membrane soon after a hormone was added to the cell. After adding the hormone, if she disrupted the cell and centrifuged it, the protein did not stay in solution but went to the bottom of the centrifuge tube. After adding the hormone, if she disrupted the cell and dissolved all membranes with a detergent before centrifuging, the protein remained in solution. Which statement best explains her results?
A)
The protein was a peripheral membrane protein that came off the membrane after hormone treatment.
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B)
The hormone caused the cell to make endocytotic vesicles that specifically formed at sites in the plasma membrane that contained the protein.
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C)
The hormone destroyed the protein.
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D)
The hormone bound to the protein to make the protein heavier.
Strips of the same plant tissue were immersed in a range of sucrose solution of different concentrations. Their lengths were measured before immersion and after 30 minutes of immersion in different solutions. The graph If shows the ratio of initial length to final length. Which concentration of sucrose solution has the same water potential as that of cell sap?
In some chordates, the notochord is modified as the vertebral column. Such animals are called vertebrates. Which one of the following statements makes sense regarding it?
A)
All chordates are vertebrates but all vertebrates are not chordates.
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B)
All vertebrates are chordates and all chordates are vertebrates.
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C)
All vertebrates are chordates but all chordates are not vertebrates.
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D)
Chordates are not vertebrates and vertebrates are not chordates.
Match the blood vessels of human heart listed under column-l with the functions given under column-ll. Choose the answer which gives the correct combination of the alphabets of the two columns.
Column-I
Column-II
(Blood Vessel)
(Function)
a. Superior vena cava
p. Carries deoxygenated blood to lungs
b. Inferior vena cava
q. Carries oxygenated blood to lungs
c. Pulmonary artery
r. Brings deoxygenated blood to the left atrium
d. Pulmonary vein
s. Brings oxygenated blood to the left atrium
t. Brings deoxygenated blood from upper parts of the body into the right atrium.