Question 1 :
The molecules in the membrane that limit its permeability are the
Question 2 :
Assertion : Coenzymes are also called prosthetic groups.<br>Reason : Coenzymes and prosthetic groups are cofactors.
Question 3 :
When dividing cells are examined under a light microscope, chromosomes first become visible during -
Question 4 :
Which of the following structures will not be common to mitotic cell of a higher plant? (1997)
Question 5 :
Arrange the following events of meiosis in correct sequence <br>(A) Crossing over<br>(B) Synapsis<br>(C) Terminalisation of chiasmata<br>(D) Disappearance of nucleous
Question 9 :
Which of the following types of plastid does not contain stored food material?
Question 11 :
Hexokinase (Glucose + ATP → Glucose 6-P + ADP) belongs to the category
Question 13 :
<p>In which of the following stages of the cell cycle chromosome number becomes half?</p>
Question 15 :
Which of the events listed below is not observed during mitosis?
Question 16 :
The process by which the chromosomes are separated in the sex cells and their number reduced from the diploid to haploid condition is known as
Question 18 :
At metaphase, chromosomes are attached to the spindle fibres by their:
Question 21 :
Which one of the given graph shows the effect of pH on the velocity of a typical enzymatic reaction (V) ?<br /><img style='object-fit:contain' src="https://s3.ap-south-1.amazonaws.com/me-p/5f4ce44b16d7e6154e451077.jpg" />
Question 22 :
If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?
Question 23 :
<p>What is the approximate duration of cell cycle for a mammalian cell?</p>
Question 24 :
The Km value of the enzyme is the value of the substrate concentration at which the reaction reaches to
Question 27 :
Which one of the following statements is true for the enzymes
Question 29 :
<p>Which of the following type of cell cycle is known as equational division?</p>
Question 34 :
An amino acid under certain conditions have both positive and negative charges simultaneously in the same molecule. Such a form of amino acid is called
Question 38 :
The non- sister chromatids twist around and exchange segments with each other during or in meiosis crossing over is initiated at
Question 39 :
Which one is correct for G<sub>0</sub> stage? <br>I. It is a quiescent stage <br>II. In this phase cell cycle is stropped <br>III. G<sub>0</sub> cells in the stage do not grow or proliferate but metabolically active <br>IV. G<sub>0</sub> cells can divide in response to some stimulus
Question 43 :
Assertion : Cell membrane is semipermeable.<br>Reason : The constituent molecules can freely move in the membrane.
Question 45 :
<p>The interphase is divided into three main phases. There phases are</p>