Sumo Biology

What is the role of RNA polymerase III in the process of transcription in Eukaryotes?
(1) Transcription of only snRNAs
(2) Transcription of rRNAs (28S, 18S and 5.85)
(3) Transcription of tRNA, 5 s rRNA and snRNA
(4) Transcription of precursor of mRNA

The RNA polymerase I transcribes rRNA (28S, 18S, and 5.8S), whereas the RNA polymerase III is responsible for transcription of tRNA, 5srRNA, and snRNAs (small nuclear RNAs).
The RNA polymerase II transcribes precursor of mRNA, the heterogeneous nuclear RNA (hnRNA).

What is the role of RNA polymerase III in the process of transcription in Eukaryotes? What is the role of RNA polymerase III in the process of transcription in Eukaryotes? (1) Transcription of only snRNAs (2) Transcription of rRNAs (28S, 18S a...

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : Late wood has fewer xylary elements with narrow vessels.
Reason R : Cambium is less active in winters.

In the light of the above statements, choose the correct answer from the options given below :

1. A is false but R is true.
2. Both A and R are true and R is the correct explanation of A.
3. Both A and R are true but R is NOT the correct explanation of A.
4. A is true but R is false.

Late wood has fewer xylary elements with narrow vessels.Reason R : Cambium is less active in winters Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R : Assertion A : Late wood has fewer xylary elements wit...

Among eukaryotes, replication of DNA takes place in -
G2 phase
(2) M phase
(3) S phase
(4) G1 phase

G1 phase corresponds to the interval between mitosis and initiation of DNA replication. During G1 phase the cell is metabolically active and continuously grows but does not replicate its DNA. S or synthesis phase marks the period during which DNA synthesis or replication takes place.

During this time the amount of DNA per cell doubles. If the initial amount of DNA is denoted as 2C then it increases to 4C. However, there is no increase in the chromosome number; if the cell had diploid or 2n number of chromosomes at G1 , even after S phase the number of chromosomes remains the same, i.e., 2n.

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Among eukaryotes, replication of DNA takes place in - G2 phase (2) M phase(3) S phase (4) G1 phase Among eukaryotes, replication of DNA takes place in - G2 phase (2) M phase(3) S phase (4) G1 phase G1 phase corresponds to the interval between mitosis and i...

There is a characteristic distribution of the cells within the embryo sac. Three cells are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus, in turn, consists of two synergids
and one egg cell.

The synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which play an important role in guiding the pollen tubes into the synergid. Three cells are at the chalazal
end and are called the antipodals.

page - 27

In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially There is a characteristic distribution of the cells within the embryosac. Three cells are grouped together at the micropylar end and constitutethe egg appara...

There is a characteristic distribution of the cells within the embryo sac. Three cells are grouped together at the micropylar end and constitute the egg apparatus. The egg apparatus, in turn, consists of two synergids and one egg cell.

The synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which play an important role in guiding the pollen tubes into the synergid. Three cells are at the chalazal
end and are called the antipodals.

page - 27

In angiosperm, the haploid, diploid and triploid structures of a fertilized embryo sac sequentially There is a characteristic distribution of the cells within the embryosac. Three cells are grouped together at the micropylar end and constitutethe egg appara...

Given below are two statements :
One is labelled as Assertion A and the other is labelled as Reason R:

Assertion A : The first stage of gametophyte in the life cycle of moss is protonema stage.

Reason R : Protonema develops directly from spores produced in capsule.
In the light of the above statements,

choose the most appropriate answer from the options given below :

(1) A is not correct but R is correct.
(2) Both A and R are correct and R is the correct explanation of A.
(3) Both A and R are correct but R is NOT the correct explanation of A.
(4) A is correct but R is not correct.

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R: Assertion A : The first stage of gametophyte in the l...

Question: Broad palm with single palm crease is visible in a person suffering from?
Answer: _____

Broad palm with single palm crease is visible in a person suffering from Down syndroma - NEET 2023 Broad palm with single palm crease is visible in a person suffering from ThalassemiaDown's syndromeTurner's syndromeKlinefelter's syndromeThe cause of this ...