RE-NEET Zoology Class 12 Questions
48 questions
The inactive form of Bt toxin is converted to the active form in the insect gut
Match List-I with List-II.
Which of the following hormone is not secreted by human placenta?
Sperm motility is due to
During PCR, primers bind to the DNA strands in the ______ step.
Which of the following is used as a clot buster?
Given below are two statements :
Statement I: Plasmids are autonomously replicating DNA.
Statement II: Plasmids are extrachromosomal DNA.
In the light of the above statements, choose the most appropriate answer from the options given below :
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Forelimbs of human and bats are homologous. Reason R : Forelimbs of humans and bats have similar anatomical structure. In the light of the above statements, choose the most appropriate answer from the options given below :
Which of the following are secondary lymphoid organs ? (a) Bone marrow (b) Tonsils (c) Spleen (d) Thymus
Which of the following disease is not sexually transmitted?
The covering of ovum at ovulation is
Which of the following structure is not a part of the male reproductive system?
Which of the following statements is correct about Plasmodium?
A population of diploid organisms is in Hardy-Weinberg equilibrium. If the frequency of allele A is 0.1, the frequency of AA is
Adaptive radiation in placental mammals and Australian Marsupials, leading to similarity between distant species is an example of
Colostrum, secreted by mother during initial days of lactation, is abundant in
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: In recombinant DNA technology, lysozyme is used for disrupting bacterial cells while cellulase is for plant cells. Reason R: Isolation of genetic material needs disruption of cells. In the light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements:
Statement I: Ovulation is caused by LH surge leading to rupture of Graafian follicles.
Statement II: Graafian follicle remaining after ovulation transform into corpus luteum and secretes large amount of estrogen.
In the light of the above statements, choose the most appropriate answer from the options given below:
Natural selection can lead to (a) stabilisation (b) genetic drift (c) directional change (d) disruption
The method of directly injecting a sperm into ovum in assisted reproductive technology is called:
Which of the following is used as an effective sedative and painkiller for treating post-surgery patients?
Which of the following is not evidence for evolution?
Given below are two statements:
Statement I: Modern Homo sapiens arose in Australia and moved across continents.
Statement II: Homo sapiens arose around 75000 to 10000 years ago.
In the light of the above statements, choose the most appropriate answer from the options given below:
Given below are two statements:
Statement I: The Indian Government has set up GEAC, which will make decisions regarding the validity of GM research.
Statement II: Biopiracy is the term used to refer to the use of bio-resources by native people.
In the light of the above statements, choose the correct answer from the options given below:
Match List-I with List-II:
Cryopreservation technique is used for:
Identify the incorrect statement related to gel electrophoresis.
Recombinant DNA molecule can be created normally by cutting the vector DNA and source DNA respectively with:
The Bt toxin in genetically engineered Bt cotton kills the pest by:
Following are the steps involved in action of toxin in Bt. Cotton
A. The inactive toxin converted into active form due to alkaline pH of gut of insect.
B. Bacillus thuringiensis produce crystals with toxic insecticidal proteins.
C. The alkaline pH solubilises the crystals.
D. The activated toxin binds to the surface of midgut cells, creates pores and causes death of the insect.
E. The toxin proteins exist as inactive protoxins in bacteria.
Match List-I with List-II:
Which evolutionary phenomenon is depicted by the sketch given in figure?
Select the restriction endonuclease enzymes whose restriction sites are present for the tetracycline resistance (tetR) gene in the pBR₃₂₂ cloning vector.
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: During menstrual cycle, the ovulation takes place approximately on day.
Reason R: Rapid secretion of LH in the middle of menstrual cycle induces rupture of Graafian follicle and thereby the release of ovum.
In the light of the above statements, choose the most appropriate answer from the options given below.
Match List-I with List-II with respect to convergent evolution:
Match List-I with List-II relating to examples of various kind of IUDs and barrier:
Given below are two statements:
Statement I: Antibiotics are chemicals produced by microbes that kill other microbes.
Statement II: Antibodies are chemicals formed in body that eliminate microbes.
In the light of the above statements, choose the most appropriate answer from the options given below.
Arrange the following parts in human Mammary gland, traversing the route of milk ejection.
A. Mammary duct
B. Lactiferous duct
C. Mammary alveolus
D. Ampulla
E. Mammary tubule Choose the correct answer from the options given below:
Which of the following are correct about EcoR₁?
A. Cut the DNA with blunt end
B. Cut the DNA with sticky end
C. Recognise a specific palindromic sequence
D. Cut the DNA between the base G and A when encounters the DNA sequence ‘GAATTC’
E. Exonuclease Choose the correct answer from the options given below:
Match List-I with List-II:
Match List-I with List-II:
Following is the list of STD's. Select the diseases which are not completely curable.
A. Genital warts
B. Genital herpes
C. Syphilis
D. Hepatitis-B
E. Trichomoniasis
What is the correct order (old to recent) of periods in Paleozoic era?
Match List-I with List-II relating to human female external genitalia.
Given below are two statements:
Statement I: RNA interference takes place in all Eukaryotic organisms as method of cellular defense.
Statement II: RNAi involves the silencing of a specific mRNA due to a complementary single-stranded RNA molecule that binds and prevents translation of mRNA.
In the light of the above statements, choose the correct answer from the options given below.
Following are the steps involved in the process of PCR.
A. Annealing
B. Amplification (~1 billion times)
C. Denaturation
D. Treatment with Taq polymerase and deoxynucleotides
E. Extension Choose the correct sequence of steps of PCR from the options given below:
Match List-I with List-II:
Match List I with List II: