A chromosome with an extremely short and a very long arm is called ________.
Acrocentric
Chromosomes are classified by the position of the centromere (primary constriction), which divides the chromosome into two arms.
When the centromere is situated close to one end, the chromosome has one extremely short arm and one very long arm. Such a chromosome is called acrocentric.
A metacentric chromosome has the centromere in the middle, forming two equal arms. A submetacentric chromosome has the centromere slightly away from the middle, giving one shorter and one longer arm, but not an extremely short one. A telocentric chromosome has a terminal centromere, so it effectively has only one arm.
Acrocentric option is correct.
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Important Questions from Cell : Structure and Functions
A student was asked to identify a permanent slide of mitosis. He made the following observations.
(i) Splitting of centromere and formation of daughter chromatids.
(ii) Chromatids are migrating towards the opposite poles.
The stage would be
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A diploid cell which has 8 chromosomes undergoes meiosis and produces 4 daughter cells. What is the number of chromosomes present in each daughter cell formed at the end of meiosis-I?
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a) The active site of the enzyme, now in close proximity of the substrate, breaks the chemical bonds of the substrate and the new enzyme product complex is formed.
b) The substrate binds tightly to the enzyme, inducing a change in the active site of the enzyme.
c) The enzyme releases the products of the reaction and the free enzyme is ready to bind to another molecule of the substrate.
d) The substrate binds to the active site of the enzyme.
Which of the following is not the function of plasma membrane?
