Hello Students: DAY- 22 Morning Coffee with NEET

HELLO STUDENTS: DAY- 22 Morning

CRACK THE NEET - BIOLOGY BY A GLANCE IN TEN MINUTES !!!

1."Who has identified ""Jumping Genes" (or) " "Walking Genes"(or) "TRANSPOSONS" (or) " Transposable elements "(TEs) ?:

= Barbara McClintock

2.What are "Junk DNA"?

=Regions of DNA that are not- coding

3.Why does introns of DNA are significant  while do not encode protein products ?

= Introns are integral to gene expression regulation and also allow for faster evolution.

4.Who was invented Polymerase Chain Reaction (PCR) in 1985?

= Kary Banks Mullis

5.Who has first invented and used DNA fingerprinting technology ?

= Sir Alec Jeffreys

6.Which are the memraneless Organelles found in a cell?

= Ribosome,Cell wall and Centrioles

7.Which Organelles that contains DNA?

= Nucleus, Mitochondria and Chloroplast

8. Which are called as "Semi autonomous Organelles"?

= Chloroplast and Mitochondria (due to the presence of DNA)

9.Where from the Acrosome of a sperm is derived ?

= Golgi apparatus

10.Which organelles are involved in Autolysis?

= Lysosomes

11.Which mineral deficient area,the Insectivorous plants are growing ?

= Nitrogen

12.Which kind of plants ,Vivipary is noticed?

= HALOPHYTES ,the Mangrove plants (Eg: Rhizophora,Bruguiera,Ceriops,Kandelia,Nypa,Aegiceras and Avicennia)

13.What we call the negatively geotropic respiratory roots are commonly found in mangrove vegetation like Rhizophora?

= Pneumatophores = Due to high salinity in water ,Special aerial roots are produced to get oxygen from the atmosphere ,(Pneumathodes are the pores found in respiratory roots)

14.What is a spongy tissue found in EPIPHYTES like Vanda,Clivia and Orchids to absorb moisture from the atmosphere and rain water ?

= Velamen

15.What we call the plant with mesophyll differentiated into upper Palisade and lower Spongy parenchyma?

Dorsiventral leaves (Eg: Dicot leaves )

16.What we call the plants with undifferentiated mesophyll?

= Isobilateral leaves ( Eg: Monocot leaves)

17.What is Tonoplast ?

= Membrane covering of a Vacuole of a plant cell 

18.What is Symplast ?

= A continuous network of interconnected plant cell protoplasts

19.What we call the space outside the plasma membrane within which materials can diffuse freely ?

= Apoplast

20.Which is a Gymnosperm exceptionally found with Xylem vessels ?

= Gnetum

21.What is the role of Bulliform cells (or) Motor Cells found in upper epidermis of monocot leaves?

= Folding and unfolding of leaf tissue to get light and to reduce water loss

22.Which plant gives commercial cork ?

= Quercus suber

23.Which is a complete ( or ) total stem parasite?

= Cuscuta

24.Which plant family stems have Bicollateral vascular bundles?

= Cucurbitaceae (Eg: Cucurbita)

25.Which is a innermost cortical layer of Dicot and Monocot root ?

= Endodermis 

Mr.R.Soundarapandian, MSc, MEd, MPhil, 

PG Asst Zoology 
SIR MCTM Boys Higher Secondary School, 

Purasawalkam Chennai-84.