Classification of porifera is based upon –
The formula for the line would best be written as
The diagram summarises the pathway of glucose breakdown
When two steps result in a net increase of ATP?
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Solution
ATP formation occurs both at 2, where glyceraldehyde-3-phosphate is converted to pyruvate; and at 5, where the six-carbon compound, citrate,releases water and CO2 in the Krebs cycle.
Which of the following would you not expect to find in prokaryotic DNA?
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Solution
Histone proteins are used to coil the large amount of DNA found in eukaryotes so that it can be packaged more efficiently within the cell. Prokaryotes do not face this problem because they have much less DNA.
Match Column – I with Column – II
Chromosomes are composed of
Flowers are sessile in –
First life on earth was
Frequency of a character or a mutant gene in a population is expected to increase if the phenotype or its gene is.
If two solutions have the same osmolarity. They are said to be
Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell?
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Solution
This connection allows material produced in the nucleus to directly enter the ER via the nuclear pores.
Consider the following statements and select the correct ones out of these
(1)Flame cells are excretory structures in flatworms.
(2)Green glands are excretory organs in annelids.
(3)Columns of Bertini are the conical projections of renal pelvis into renal medulla between the renal pyramids.
What is true for photolithotrops?
Lactose operon produces enzymes
Which one of the following is smallest living cell and live without oxygen?
Somatostatin
In DNA purine nitrogen bases are
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Solution
In DNA purine nitrogen bases are Guanine and Adenine.
A stage in cell division is shown in the figure. Select the answer which gives correct identification of the stage with its characteristics.
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Solution
Telophase is the stage of reconstitution of nuclei. The chromosomes that have reached their respective poles decondense and lose their individuality and collect in amass in the two poles. Nuclear envelope assemble around chromatin mass. Nucleolus, Golgi complex and ER re-form.
What is ture regarding peroxidases and catalases ?
Sweet potato is homologous to
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Solution
Sweet potato and turnip both are roots and become modified for special functions, the most common being the formation of tuberous roots for food storage