12th Standard Zoology: Previous Year Mixed Test

In which type of Parthenogenesis are only males produced?

Statement I: Castration (or) surgical removal of testis is known as Orchidectomy.
Statement II: It leads to difficulty in urination.

Select the incorrect action of hormonal contraceptive pills from the following.

This pedigree symbol represents:

Hershey and Chase's experiment with bacteriophage showed that:

Find out the wrongly matched pair.

The wings of birds and butterflies is an example of:

Which of the following groups of diseases have been controlled by the use of vaccines and by creating awareness among the people?

Allergy involves:

The most common substrate used in distilleries for the production of ethanol is ________.

Assertion (A): In nature many organisms produce clones through asexual reproduction.
Reason (R): By this process, genetically identical individuals are produced.

The relationship between sucker fish and shark is ________.

The term "Niche" was first used by ________.

Which one of the following are at higher risk of extinction due to habitat destruction?

________ is/are an ideal disinfectant for waste water.

A person is injured and got swelling. The swelling, due to the infection of tissue is an example of :

The first codon to be deciphered was __________ which codes for __________.

Find out the wrongly matched pair.

The Neanderthal man had the brain capacity of :

Which one of the following groups includes sexually transmitted diseases caused by bacteria only ?

ELISA is mainly used for :

The most important hormone in initiating and maintaining lactation after birth is :

Assertion : The Environmental conditions of the Tropics are favourable for speciation and diversity of organisms.
Reason : The climate seasons, temperature, humidity and photo period are more or less stable and congenial.

The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively ?

The mode of sexual reproduction in bacteria is by :

The headquarters of the National Biodiversity Authority is situated in __________.

The clusters of gene with related functions are called as __________.

Which of the following micro-organisms is used for production of citric acid in Industries ?

The ‘thickness’ of Stratospheric Ozone layer is measured in :

Haemozoin is :

Colostrum is rich in :

Without altering water quality, __________ is/are an ideal disinfectant used in waste water treatment.

The ovary remains attached with pelvic wall and the uterus by an ovarian ligament, called :

B cells are activated by :

A mRNA molecule is produced by :

The average foetal heart rate is :

The wings of birds and butterflies is an example of :

Modern man belongs to which period ?

The most common substrate used in distilleries for the production of ethanol :

GEAC stands for :

Match the pathogens with respective diseases caused by them and select the correct match using the codes given below :
(A) Leishmania donovani — (i) Amoebiasis
(B) Wuchereria bancrofti — (ii) Kala-azar
(C) Trypanosoma gambiense — (iii) Sleeping sickness
(D) Entamoeba histolytica — (iv) Filariasis

Which of the following is an r-species ?

ABO blood group in man is controlled by :

The organization which collects, compiles and publishes the red list of threatened species :

In which mode of reproduction variations are seen ?

Competition between species leads to :

________ is used to lower blood cholesterol level.

Which one of the following is true to gastrulation ?

Which of the following Codon codes for methionine ?

ZW-ZZ system of sex determination occurs in :

The golden age of reptiles was :

________ was the first human like being.

Animals that can move from Fresh water to Sea water :

The first ejaculation of the semen is ________.

Exo-erythrocytic schizogony of Plasmodium takes place in :

The male sex hormone testosterone is secreted from :

Dodo, Passenger pigeon and Steller's sea cow have become extinct due to ________.

Allergy involves :

The highest DDT concentration in aquatic food chain shall occur in :

The mode of sexual reproduction in bacteria is by :

Radioactive wastes can be disposed off by ________.

In which mode of reproduction are variations seen?

Which one of the following are at high risk of extinction due to habitat destruction?

When a Drosophila body cells contain 3 sets of autosomes and 2 X chromosomes, what will be the sex of the fly?

The total number of nitrogenous bases in human genome is estimated to be about ________.

A contraceptive pill prevents ovulation by:

Organisms which can survive a wide range of temperature are called ________.

B-lymphocytes are activated by:

The most common substrate used in distilleries for the production of ethanol is:

Which is the correct order of action?

A population will not exist in Hardy Weinberg equilibrium, if:

ABO blood group in man is controlled by:

Haemozoin is:

Which one of the following is a suitable adaptation to overcome food and water scarcity?

The purpose of biological treatment of waste water is to ________.

The golden age of reptiles was :

In embryo transfer technique, ________ celled blastomere is transferred into the uterus.

Which of the following is the correct sequence of events with reference to the central dogma ?

The process which the sperm undergoes before penetrating the ovum is :

According to Alexander Von Humboldt, species - area relationship is log S = log C + Z log A, where 'Z' is :

Animals that can move from freshwater to seawater are called as :

Allergy involves :

The mode of reproduction in bacteria is by :

XO type of sex determination and XY type of sex determination are examples of :

Who proposed the 'Germplasm theory' ?

Which one of the following is used to lower blood cholesterol level ?

Which one of the following method is not used in biomedical waste disposal ?

Vaccines that use components of a pathogenic organism rather than the whole organism are called :

The sporozoites of Plasmodium vivax are formed from :

What is the sex of Drosophila which possess 2A + XXY chromosomes ?

Paedogenetic Parthenogenesis occurs in :

Which of the following menstrual irregularities is correctly matched ?

Which one of the following technique is used to monitor the foetal heart rate and other functions during late pregnancy and labour ?

If the Child’s blood group is ‘O’, the father’s blood group is ‘A’ and the mother’s blood group is ‘B’, the genotypes of the parents will be :

Assertion (A) : XX - XO type of sex determination is seen in bedbugs, cockroaches and grasshoppers.
Reason (R) : The sex of the offspring depends upon the sperm that fertilizes the egg.

Which of the following chromosome has the highest gene density ?

__________ and __________ proposed the classical model of Lac operon to explain gene expression and regulation in E. coli.

A population will not exist in Hardy-Weinberg equilibrium if :

Find the true and false statements from the following :
(i) Plasmodium vivax is a digenic parasite.
(ii) The life cycle of Plasmodium involves 3 phases namely, schizogony, polygony and sporogony.
(iii) The large schizont shows yellowish - brown pigmented granules called Schuffner’s granules.
(iv) Plasmodium infection leads to Lysis of white blood cells results in cycles of fever and other symptoms.

B Cells that produce and release large amounts of antibody is called :

Which one of the following bacterium is not involved in ethanol production ?

The first clinical gene therapy was done for the treatment of :

Which of the following group of animals are the common fauna of the Thar deserts ?

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

Which one of the following is not coming under in situ conservation ?