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TLS Online TPP Program

#Question id: 11371

Which statement about gram-negative bacteria is correct?

#Unit 9. Diversity of Life Forms

Penicillins are the best antibiotics to use against them.
They often possess an outer membrane containing toxic lipopolysaccharides.
Their chromosomes are composed of DNA tightly wrapped around large amounts of histone proteins.
Their cell walls are primarily composed of peptidoglycan

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TLS Online TPP Program

#Question id: 23285

#Unit 8. Inheritance Biology

Chromosome are classified into four basic term,

Chromosome

A) Metacentric chromosome

i) centromeres present at the end of the chromosome

B) Submetacentric chromosome

ii) chromomere near the end of the chromosomes

C) Acrocentric chromosome

iii) Centromere in the middle of the chromosome and divides the chromosome into two equal arms.

D) Telocentric chromosome

iv) The centromere is present near the middle and divides the chromosome into two unequal arms

TLS Online TPP Program

#Question id: 23286

#Unit 8. Inheritance Biology

Individual chromosomes may lose or gain parts and the order of genes within a chromosome may become altered. These variations in the number and structure of chromosomes are termed as

TLS Online TPP Program

#Question id: 23287

#Unit 8. Inheritance Biology

Chromosome mutations can be grouped into three basic categories:

I) Chromosome rearrangements

III) Polyploidy

these mutation alters the number and structure of chromosomes such as,

a) One or more individual chromosomes are added or deleted

b) The loss of a chromosomal segment

c) A piece of a chromosome might be duplicated, deleted, or inverted

d) One or more complete sets of chromosomes are added

e) In which one or more copies of a DNA segment is produced

Find out the correct pairing of chromosomal mutations,

TLS Online TPP Program

#Question id: 23288

#Unit 8. Inheritance Biology

The staining of chromosomes with a special dye called Giemsa reveals G bands, which distinguish

TLS Online TPP Program

#Question id: 23289

#Unit 8. Inheritance Biology

Preparation and staining techniques help to distinguish among chromosomes of similar size and shape, this staining techniques also distinguish the banding pattern of the chromosome at which stage of cell cycle?

TLS Online TPP Program

#Question id: 23560

#Unit 13. Methods in Biology

DNA molecules which are constructed with DNA from different sources are called