Tag: the mitotic cell cycle

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Questions Related to the mitotic cell cycle

Multiple choice botany the mitotic cell cycle chromosome and its structure chromosome nucleus and chromosome

Which one is present on chromosome?

  1. Centromere

  2. Centrosome

  3. Nucleus

  4. Golgi body
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The centromere is the lighter staining region present on the chromosome of a cell which appears as a constriction.
  • They are also known as a primary constriction or kinetochore.
  • It is a specialized DNA sequence that links a pair of sister chromatids where the spindle fibres are attached during cell division.
  • So, the correct answer is 'Centromere'.
Multiple choice botany the mitotic cell cycle chromosome and its structure chromosome nucleus and chromosome

Sister chromatids are joined at

  1. Chromocentre

  2. Metacentre

  3. Centromere

  4. Telomere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The specialized DNA sequence that links a pair of sister chromatids where the spindle fibres are attached during cell division is known as a centromere.
  • It is the lighter staining region on the chromosome of a cell which appears as a constriction.
  • They are also known as a primary constriction or kinetochore.
  • So, the correct answer is 'Centromere'.
Multiple choice botany the mitotic cell cycle chromosome and its structure chromosome nucleus and chromosome

Kinetochore is

  1. Granule within centromere

  2. Surface of centromere

  3. Constriction near chromosome end

  4. End of chromosome
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The centromere is the lighter staining region on the chromosome of a cell which appears as a constriction.
  • They are also known as a primary constriction or kinetochore.
  • The kinetochore is a proteinaceous structure that assembles at the surface of the centromere which forms the site for binding of spindle fibres during cell division.
  • So, the correct answer is 'Surface of centromere'.
Multiple choice botany the mitotic cell cycle chromosome and its structure chromosome nucleus and chromosome

The term chromosome was coined by

  1. Hofmeister

  2. Strasburger

  3. Waldeyer

  4. Laemli
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Chromosomes can be defined as thread-like structure which contains DNA and proteins which are found in the nucleus of most living cells.
  • They carry the genetic information in the form of genes.
  • The word chromosome is derived from the Greek word chroma meaning "colour" and soma meaning "body".
  • The term was coined by von Waldeyer-Hartz in relation to the term chromatin which was introduced by Walther Flemming.
  • So, the correct answer is 'Waldeyer'.
Multiple choice botany the mitotic cell cycle chromosome and its structure chromosome nucleus and chromosome

Term chromosome was coined by

  1. Hofmeister

  2. Sutton

  3. Boveri

  4. Waldeyer
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The term "chromosome" (comes from the Greek word "chroma" meaning colour and "soma" meaning "body", describing their strong staining by particular dyes) was first suggested in 1888 by the German anatomist Heinrich Wilhelm Gottfried von Waldeyer-Hartz.


So, the correct answer is 'Waldeyer'

Multiple choice botany the mitotic cell cycle chromosome and its structure chromosome nucleus and chromosome

Chromosome theory of inheritance was proposed by

  1. Sutton $(1902)$
  2. Boveri $(1902)$
  3. Both Sutton $(1902)$ and Boveri $(1902)$
  4. Correns $(1909)$
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chromosome theory of inheritance or Boveri–Sutton chromosome theory is a fundamental unifying theory of genetics which identifies chromosomes as the carriers of genetic material

So, the correct answer is 'Both Sutton (1902) and Boveri (1902)'.

Multiple choice botany the mitotic cell cycle chromosome and its structure chromosome nucleus and chromosome

More than $200$ chromosomes occur in

  1. Chicken

  2. Dog

  3. Amoeba

  4. Gorilla
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

1) Chicken has a diploid number of 78 (2n = 78).

2) Dog has a diploid number of 78 (2n=78).
3) The genome for Amoeba proteus is very large containing over 290 billion base pairs in its genome. The Amoeba proteus has more than 500 chromosomes in a single nucleus.
4) Gorilla has a diploid number of 48 (2n=48).
So, the correct answer is 'Amoeba'.