Incorrect Practice Questions Flashcards by Anamta Farook

Which of the following secretes relaxin during the later stages of pregnancy?
corpus luteum - foetus - uterus - Graafian follicle

corpus luteum

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Which of the following are correct regarding linked genes?
I. located next to each other on the same chromosome
II. violate the law of independent assortment
III. segregate together during meiosis

I, II & III

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Down Syndrome was first described in the year

1866

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Blood group antigens are ________

carbohydrates present on surface of RBCs

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Find the incorrect match:
pedigree analysis - Mendelian trait
Henking’s X body - one each in sperm
Pleiotropy - Single gene multiple phenotype
Polygenic inheritance - across a gradient

Henking’s X body - one each in sperm

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Which of the following characteristics represent ‘Inheritance of blood groups’ in humans?
Dominance, Co-dominance, Multiple dominance, Polygenic Inheritance, Incomplete dominance

Dominance, Co-dominance, Multiple dominance

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The process of splicing in eukaryotes:

a) is reminiscent of antiquity
b) represents the dominance of RNA-world
c) is an indicator of the complexity of the human genome
d) is a legacy of organic evolution

b) represents the dominance of RNA-world

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Which enzyme polymerizes RNA with defined sequences in a template independent manner?

Polynucleotide phosphorylase

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The core RNA polymerase is capable of catalyzing which steps of transcription?
Initiation - Elongation - Termination - Al of these

Elongation only

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Polymerisation of which of the following produces nucleic acids?
nucleosides - nucleotides - DNA and RNA - Both 1 and 2

nucleotides

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In lac operon, repressor is inactivated by interaction with ________
carbohydrate - protein - nucleic acid - enzyme

carbohydrate

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Hashish causes altered thought perceptions and hallucinations? T or F?

True

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Opium stimulates the nervous system and causes hallucinations. T or F?

False

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Barbiturates cause relaxation and temporary euphoria. T or F?

False

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Which of the following sets of diseases is caused by bacteria?

a) Cholera and tetanus
b) Typhoid and smallpox
c) Tetanus and mumps
d) Herpes and influenza

a) Cholera and tetanus

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As the housefly is related with Entamoeba histolytica, Aedes mosquito is related with _______

Virus

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Cells of immune system that do not provide innate immunity:

T-lymphocytes - Neutrophils - NK cells - Macrophages

T-lymphocytes

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Alpha-interferons can:

a) suppress the immune system
b) activate the immune system
c) destroy a tumor
d) both #2 and #3

d) both #2 and #3

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Mast cells secrete ________

histamine

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Vaccines are available for which of these diseases:

polio - diptheria - pneumonia - tetanus

all of them

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Which is the most common mechanism of genetic variation in a population that reproduces asexually?

a) Transduction
b) Chromosomal aberrations
c) Genetic drift
d) Recombination

d) Recombination

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Process by which organisms with different evolutionary history evolve similar phenotypic adaptations in response to a common environmental change is:

a) adaptive radiation
b) non-random evolution
c) convergent evolution
d) natural selection

c) convergent evolution

Which of the following are analogous structures?

a) Wings of bat and wings of pigeon
b) Gills of Prawn and Lungs of Man
c) Thorns of Bougainvillea and Tendrils of Cucurbita
d) Flippers of Dolphin and Legs of Horse

b) Gills of Prawn and Lungs of Man

Hysterectomy is surgical removal of _____

uterus

Assisted reproductive technology involves the transfer of: a. ovum into fallopian tube b. zygote into fallopian tube c. zygote into uterus d. embryo (up to 16 blastomeres) into fallopian tube

b. zygote into fallopian tube

Cu ions released from IUDs: a. make uterus unsuitable for implantation b. increase phagocytosis of sperms c. suppress sperm motility d. prevent ovulation

c. suppress sperm motility (and fertilizing capacity)

Which of the following is incorrect wrt vasectomy? a) No sperm occurs in seminal fluid b) No sperm occurs in vasa efferentia c) Vasa deferentia is cut and tied d) Irreversible sterility

b) No sperm occurs in vasa efferentia

Which of the following is checked by amniocentesis? a) Biochemical abnormalities in the foetus b) Errors of metabolism in the foetus c) Chromosomal abnormalities in the foetus d) All of the above

c) Chromosomal abnormalities in the foetus

The most important component of oral contraceptive pills is progesterone. T or F?

True

Oral contraceptives do not work by: a) inhibition of ovulation b) changing the consistency of cervical mucus c) antagonistic action on gonadotropins d) spermicidal action

d) spermicidal action

Saheli contains a steroidal preparation. True or False?

False, non-steroidal

Pill is to be taken daily for ________

21 days beginning within first 5 days of menstruation

In lactational amenorrhea, there is no ovulation or menstruation during period of intense lactation following parturition due to high level of prolactin which inhibits the release of _______

gonadotropins

Several South Indian states yield 2-3 crops of rice annually. The agronomic feature that makes this possible is: a) shorter rice plant b) better irrigation facilities c) early yielding rice variety d) disease-resistant rice variety

c) early yielding rice variety

Lysine and tryptophan are: a) proteins b) non-essential amino acids c) essential amino acids d) aromatic amino

c) essential amino acids

Protoplast is: a) another name for protoplasm b) animal cell c) plant cell without cell wall d) plant cell

c) plant cell without cell wall

The crops engineered for glyphosate are resistant/tolerant to _______

herbicides

Bioethanol can be produced using which of the following plants: a) Brassica b) Zea maize c) Jatropha d) Pongamia

b) Zea maize

Mutations can be induced with gamma or infrared radiations?

Gamma

A system of rotating crops with legume or grass pasture to improve soil structure is called _______

ley farming

NOT a step in MOET? a) Cow is fertilized by artificial insemination b) Fertilized eggs are transferred to surrogates at 8-32 cell stage c) Cow is administered hormone that has LH-type activity for super ovulation d) Cow yields about 6-8 eggs at a time

c) Cow is administered hormone that has LH-type activity for super ovulation IT'S FSH!!!

Himgiri, a disease-resistant plant variety is not associated with: a) wheat b) hill bunt c) white rust d) leaf and stripe rust

c) white rust

Which of the following is not an insect pest resistant variety? a) Pusa Gaurav b) Pusa Sawani c) Pusa A-4 d) Karan Rai

d) Karan Rai

BOD of waste water is estimated by measuring the amount of: a) total inorganic matter b) biodegradable organic matter c) oxygen evolution d) oxygen consumption

d) oxygen consumption

Methanogenic bacteria are not found in: a) rumen of cattle b) gobar gas plant c) bottom of water-logged paddy fields d) activated sludge

d) activated sludge

Methane is the preferred carbon source of methanogens. True or False?

False

Methane are archaebacteria. T or F?

True

Trichoderma harzianum is a useful micro-organism for biological control of soil-borne plant pathogens. T or F?

True

Baculoviruses are pathogens of anthropods used as biocontrol agents. T or F?

Common biocontrol agent for plant disease is: a) Bt b) Glomus c) Trichoderma d) Baculovirus

c) Trichoderma

Which of these is not a biofertilizer? | Rhizobium - Nostoc - Mycorrhiza - Agrobacterium

Agrobacterium

Which helps in absorption of phosporus from soil by plants? Glomus or Rhizobium or Anabaena

Glomus

Which of the following is not an example of a biopesticide: a. Bt corn b. Bt cotton c. Bt soyabean d. chili

d. chili