All the following animals are continuous breeders, except.

(a)

Frogs

(b)

Honey bees

(c)

Poultry

(d)

Rabbit

A few statements with regard to sexual reproduction are given below:
i. Sexual reproduction does not always require two individuals
ii. Sexual reproduction generally involves gametic fusion
iii. Meiosis never occurs during sexual reproduction
iv. External fertilization is a rule during sexual reproduction
Choose the correct statements from the options below:

(a)

i and iv

(b)

i and ii

(c)

ii and iii

(d)

i and iv

The Androgen Binding Protein (ABP) is produced by ________.

(a)

Leydig cells

(b)

Hypothalamus

(c)

Sertoli cells

(d)

Pituitary gland

The transfer of sperms by the male into the female genital tract is called _____

(a)

implantation

(b)

parturition

(c)

insemination

(d)

gastrulation

The hormone _____ produced by anterior pituitary plays a major role in lactation.

(a)

oxytocin

(b)

prolactin

(c)

progesterone

(d)

oestrogen

Cryopreservation of embryos are done when _____

(a)

When eggs are not available

(b)

Sperm count is less

(c)

More embryos are available than the required

(d)

there is abnormality in the embryo

Legalized marriageable age of female in India is __________

(a)

19 years

(b)

20 years

(c)

18 years

(d)

21 years

Which of the following phenotypes is not possible in the progeny of the parental genotypic combination I^AI^O x I^AI^B?

(a)

AB

(b)

O

(c)

A

(d)

B

Assertion (A): On diagnosis, Ramu is reported to have underdeveloped testis and gynaecomastia.
Reason (R): His karyotype reveals XXY condition

(a)

A is right but R is wrong

(b)

R explains A

(c)

Both A and R are wrong

(d)

Both and R are right but R is not the correct explanation of A

What is the basis for the difference in the synthesis of the leading and lagging strand of DNA molecules?

(a)

Origin of replication occurs only at the 5' end of the molecules

(b)

DNA ligase works only in the 3' → 5' direction

(c)

DNA polymerase can join new nucleotides only to the 3' end of the growing stand.

(d)

Helicases and single-strand binding proteins that work at the 5' end

The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C.
   A                    B                   C
DNA ⟶ mRNA ⟶ protein⟶ proposed by__________

(a)

A - trancscription, B-replication, C- James Watson

(b)

A - trancscription, B-trancscriptioii, C-Erwin

(c)

A - transcription, B - translation, C - Francis Crick

(d)

A- trancscription, B- extension, C-Rosalind Frankin

Human exploitation of forests, oceans etc leads to _____________-

(a)

Chromosomal mutations

(b)

Artificial Selection

(c)

Gene recombination

(d)

Natural selection

According to Darwin, the organic evolution is due to

(a)

Intraspecific competition

(b)

Interspecific competition

(c)

Competition within closely related species.

(d)

Reduced feeding efficiency in one species due to the presence of interfering species.

Paratope is an

(a)

Antibody binding site on variable regions

(b)

Antibody binding site on heavy regions

(c)

Antigen binding site on variable regions

(d)

Antigen binding site on heavy regions

Yellowish eyes is a symptom of_______

(a)

Plague

(b)

Measles

(c)

Hepatitis

(d)

Sleeping sickness

ELISA is mainly used for

(a)

Detection of mutations

(b)

Detection of pathogens

(c)

Selecting animals having desired traits

(d)

Selecting plants having desired traits

Identify the incorrect statement

(a)

Water is a universal solvent

(b)

Water has less surface tension

(c)

Water is heavier than air

(d)

When freezes water contracts

Which of the following is considered a hotspots of biodiversity in India?

(a)

Western ghats

(b)

Indo-gangetic plain

(c)

Eastern Himalayas

(d)

Both (a) and (c)

Extinction of Dodo bird and extinction of Calvaria tree is the example of:

(a)

Mass extinction

(b)

Co-extinction

(c)

Over exploitation

(d)

Exotic species invasion

In the E- waste generated by the Mobile Phones, which among the following metal is most abundant?

(a)

Copper

(b)

Silver

(c)

Palladium

(d)

Gold

Transmitting tissue is found in ______.

(a)

Micropylar region of ovule

(b)

Pollen tube wall

(c)

Stylar region of gynoecium

(d)

Integument

Which Mendelian idea is depicted by a cross in which the F₁ generation resembles both the parents.

(a)

Incomplete dominance

(b)

Law of dominance

(c)

Inheritance of one gene

(d)

Co-dominance

Due to incomplete linkage in maize, the ratio of parental and recombinants are ______.

(a)

50:50

(b)

7:1:1:7

(c)

96.4: 3.6

(d)

1:7:7:1

Which of the following one is used as a Biosensors?

(a)

Electrophoresis

(b)

Bioreactors

(c)

Vectors

(d)

Electroporation

True about interferon is that

(a)

It is synthetic antiviral agent

(b)

It inhibits viral replication in cells

(c)

It is specific for a particular virus

(d)

It causes infection