Nucleolus
Trending Questions
As spindle fibres are formed by centrioles during mitosis. But they are absent in plant cells. So who forms spindle fibres in plants in order to carry out mitosis.
-Uby. H
What is the semi autonomous and self replicating cell organelles and what is the meaning of self replicating
Wrie a brief way to calculate no. of chromosomes present in leaves, endosperm, etc. if the total no. of chromosomes of plants are given.
DNA strand from a single human cell measures about 2.2 cm in length.
True
False
What is the location of DNA in the cell before the formation of chromosomes or chromatin fibres?
- Nucleus, mitochondria, and plastid
- Nucleus, mitochondria, and Golgi
- Nucleus, Golgi, and plastid
- None of the above
Organelle / organism | Type of DNA |
(A) Chloroplast | (p) Double stranded circular DNA |
(B) Mitochondria | (q) cpDNA |
(C) E. coli | (r) Single stranded circular DNA |
- A - p, B - q, C - r
- A - r, B - p, C - q
- A - q, B - r, C - p
- A - q, B - p, C - r
Which of the following happens during Anaphase?
Chromatids are pulled to opposite poles.
Chromosomes align themselves along the equator.
Centromere is attached to the spindle fibres.
Chromosomes reach the opposite poles.
Name the functional segments of DNA.
None of the above
Histones
Chromatin
Genes
In the given figure, certain parts are indicated by letters. Select the answer which contains the correct matching of these letters with the correct parts.
A = Kinetochore, B = Chromosomes, C = Spindle
A = Chromosomes, B = Spindle, C = Kinetochore
A = Spindle, B = Kinetochore, C = Chromosomes
A = Kinetochore, B = Spindle, C = Chromosomes
- Chromonema
- Chromomeres
- Chromonemata
- Centriole
- Telomere
- Chromomere
- Satellite
- Nucleolar organiser
- Sutton
- Kornberg
- Mendle
- Khorana
- nucleotides
- proteins
- nucleic acids
- carbohydrates
At which stage, the homologous chromosomes separate due to repulsion, but are held together by the chiasmata?
Zygotene
Pachytene
Diplotene
Diakinesis
- Synthesis of rRNA
- Synthesis of tRNA
- Synthesis of mRNA
- All of the above
- Chromatin
- Nuclear membrane
- Nucleolus
- Nuclear pore
Filiform apparatus is a characteristic feature of:
Suspensor
Zygote
Egg
Synergid
- In association with mitochondria
- In pairs
- Singly
- None of the above
- Part of chromosome.
- A complete set of chromosomes.
- Half chromosome.
- Total DNA in cell.
- Nucleo-chromosome
- Nucleolar organizer
- SAT chromosome
- None of the above
- Microtubules
- Chromatin
- Microfilaments
- None of the above
The genome of gametes consists of ______.
triploid set of chromosomes
diploid set of chromosomes
polyploid set of chromosomes
haploid set of chromosomes
Chromosomes are made up of repeating units of genes.
False
True
- Mitochondria
- Golgi body
- Nucleolus
- Cytoplasm
rRNA is synthesized in ________.
Nucleolus
Chromosomes
Cytoplasm
All of these
- More than ten
- One
- none of these
- Two to eight
- Endoplasmic reticulum
- Nucleolus
- Mitochondria
- Golgi body
- Satellite
- Chromomere
- Telomere
- Centromere
- Ophioglossum reticulatum
- Nasturtium
- Haplopappus gracillis
- Casuarina