Skip to main content

Batrachospermum :Origin ,strucutre ,Thallus organisation and reproduction

By
                                              Batrachospermum Occurrence:-   (1) Batrachospermum is fresh water alga.    (2) It is found in clear, cool, and running streams.   (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green.   (4) The intensity of light changes the color of pigments.   (5) The thallus is attached to the substratum. Vegetative structure  (1) The thallus of an adult plant is soft, thick, filamentous.  (2) It is freely branched and gelatinous.   (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth        are developed on this axis.  (4) These branches are filamentous and dichotomously arranged.  (5) The main axis is corticated. It consists of a row of elongated cylindrical cells.   (6) It is differentiated into nodes and internodes.   (7) There are two types of branches that arise from the nodes:       Branches of limited growth        Branches of unlimited growth Batra
Post a Comment

Molecular Basis of inheritance-NEET Questions

By

                         Questions of the molecular basis of Inheritance



Q.1. The isotopes used in the blender experiment are?

A. 32 S and 32 P
B. 32 S and 35 P
C. 35 S and 35 P
D. 35 S and 35 P

Ans: A

Q.2. Semi-conservative mode of replication was demonstrated first in?

A. Orchid Root
B. Bean root tip
C. E. Coli
D. Neurospora

Ans: B

Q.3. The enzyme which unwinds the double helix of DNA?

A. ligase.
B. helicase
C. polymerase
D. topoisomerase

Ans: B

Q.4. The Okazaki fragments are combined by an enzyme ?
A. Ligase
B. Helicase
C. polymerase
D. topoisomerase

Ans: A

Q.5. The inherited human disorder is called by Harrods is ?

A. Sex-linked inheritance
B. Sex influenced inheritance
C. Genetic disorder
D. inborn error of metabolism

Ans: D

Q.6. The step involved in protein synthesis is?

A. Transcription and translation
B. transcription and transformation
C. Transformation and translation
D. Transvision and Transition

Ans: A

Q.7. 60 s unit combined with eukaryotic RNA?

A. 28s RNA
B. 5s RNA
C. 5.8s RNA
D. All of these

Ans : D

Q.8. The intron is removed by the process?

A. Translation
B. Transcription
C. Replication
D. Splicing

Ans: D

Q9. The process takes before the translation is?

A.Capping of mRNA
B. RNA editing
C.  Polyadelyation
D.     All of these

Ans A

Q.10. The study material of Beadle and Tatum for providing gene metabolism is?

A. Neurospora
B. Lathyrus
C. Oenothera
D. Drosophila

Ans: A




Labels:

Comments

Post a Comment

Thanks

Popular posts from this blog

Batrachospermum :Origin ,strucutre ,Thallus organisation and reproduction

By
                                              Batrachospermum Occurrence:-   (1) Batrachospermum is fresh water alga.    (2) It is found in clear, cool, and running streams.   (3) Deepwater plants are dark violet or reddish in color. But the shallow-water species are olive green.   (4) The intensity of light changes the color of pigments.   (5) The thallus is attached to the substratum. Vegetative structure  (1) The thallus of an adult plant is soft, thick, filamentous.  (2) It is freely branched and gelatinous.   (3) The central axis is made up of a single row of large cells. Whorls of branches of limited growth        are developed on this axis.  (4) These branches are filamentous and dichotomously arranged.  (5) The main axis is corticated. It consists of a row of elongated cylindrical cells.   (6) It is differentiated into nodes and internodes.   (7) There are two types of branches that arise from the nodes:       Branches of limited growth        Branches of unlimited growth Batra
Post a Comment
Read more

Biological Classification of Phylum Porifera and Ctenophora

By
                               Kingdom Animalia Phylum Porifera  :- The name of this phylum is due to presence of pores on the surface of this members. Ostia and osculum . (a) Sycon                                (b) Euspongia Characters of this phyla :- (1)            Cellular level of organization(new body is formed by the help of cell ) (2)            Acoelomate (coelomic cavity absent ) (3)            Water Canal  system is present. (4)            They are mainly marine but some members lives in fresh water (Euspongia). (5)            Diploblastic (Presence of only two germ layers). (6)            Their body is supported by skeleton called spicules which are made up of Calcium carbonate, Silica or Spongyn fibre. (7)            Digestion is intacellular. (8)            Asexual reproduction is by internal and external budding or gemmule formation . (9)            Development is indirect and  by the amphiblastula larva. (10)           Exc
Post a Comment
Read more

Human Reproductin Class 12th Notes-Male Reproductive Part

By
                               Human Reproduction The Male Reproductive Part:-                                                 It includes a pair of the testis, glands, and external genitalia. 1. The testis is present outside the abdominal cavity within a pouch-like structure called Scrotum. 2. The scrotum helps in maintaining its temperature - 2C lower than normal body temperature, because it is necessary for spermatogenesis. 3. Each testis has 250 compartments called testicular lobules. 4. Each testicular lobules contain 2-3 seminiferous tubules 5. Seminiferous tubules contain Male germ cells(Spermatogonia) and steroli cells, Male germ cells meiotically divide and form sperms. 6. Leydig's cells provide nourishment to the sperms and secrets of the Androgens hormone. 7. Male sex accessory includes Rete testis, vasa efferentia, epididymis, and vasa deferentia. Sperm release Pathway    The male accessory glands include paired  seminal vesicles , prostat
Post a Comment
Read more