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BIOLOGY KCET 2023

Human Health and Diseases

The toxic substance 'haemozoin' responsible for high fever and chill, is released in which of the following diseases?

A
Typhoid
B
Dengue
C
Pneumonia
D
Malaria

D. Malaria

Human Health and Diseases

Identify the symptoms of pneumonia.

A
High fever, weakness, stomach pain, loss of appetite
B
Difficulty in breathing, fever, chills, cough, headache
C
Nasal congestion and discharge, cough, sore throat, headache
D
Constipation, Abdominal pain, cramps, blood clots

B. Difficulty in breathing, fever, chills, cough, headache

Strategies for Enhancement in Food Production

The variety of Okra, Pusa Sawani is resistant to which of the following insect pests?

A
Cereal leaf beetle
B
Aphids
C
Jassids
D
Shoot & Fruit borer

D. Shoot & Fruit borer

Strategies for Enhancement in Food Production

With respect to Inbreeding, which among the following is not true?

A
It helps to evolve a pure line in an animal
B
Inbreeding decreases homozygosity
C
It helps in accumulation of superior genes
D
It helps in elimination of less desirable genes

B. Inbreeding decreases homozygosity

Organisms and Populations

Generally, bears avoid winter by undergoing

A
Migration
B
Diapause
C
Hibernation
D
Aestivation

C. Hibernation

Ecosystem

Match Column-I with Column-II. Select the option with correct combination.

A
1-p, 2-s, 3-r, 4-q
B
1-q, 2-r, 3-p, 4-s
C
1-p, 2-r, 3-s, 4-q
D
1-q, 2-r, 3-s, 4-p

D. 1-q, 2-r, 3-s, 4-p

Biotechnology and its Applications

PCR is used for

A
DNA amplification
B
DNA isolation
C
DNA ligation
D
DNA digestion

A. DNA amplification

Biotechnology Principles and Processes

Which of these is NOT a method to make host cells 'competent' to take up DNA?

A
Use of disarmed pathogen vectors
B
Micro-injection
C
Elution
D
Biolistics

C. Elution

Biotechnology Principles and Processes

Select the correct statement from the following:

A
DNA from one organism will not band to DNA from other organism
B
Genetic engineering works only on animals and not yet successfully used on plants
C
There are no risk factors associated with r-DNA technology
D
The first step in PCR is heating which is used to separate both the strands of gene of interest

D. The first step in PCR is heating which is used to separate both the strands of gene of interest

Organisms and Populations

Choose the incorrect statement with reference to Kangaroo rat.

A
Eliminates dilute urine
B
Found in North American desert
C
Meets its water requirements through internal fat oxidation
D
Uses minimal water to remove excretory products

A. Eliminates dilute urine

Molecular Basis of Inheritance

During transcription the DNA strand with 3’ → 5' polarity of the structural gene always acts as a template because

A
Nucleotides of DNA strand with 5' → 3' are transferred to mRNA
B
Enzyme DNA dependent RNA polymerase always catalyse the polymerisation in 5’ → 3' direction
C
Enzyme DNA dependent RNA polymerase always catalyse the polymerisation in 3' → 5' direction
D
Enzyme DNA dependent RNA polymerase always catalyse polymerisation in both the directions

B. Enzyme DNA dependent RNA polymerase always catalyse the polymerisation in 5’ → 3' direction

Biodiversity and Conservation

According to David Tilman's long term ecosystem experiments, the total biomass in plots with more species shows

A
No variation from year-to-year
B
Less variation from year-to-year
C
High variation from year-to-year
D
Average variation from year-to-year

B. Less variation from year-to-year

Environmental Issues

The toxic heavy metals from various industries which cause water pollution, normally have a density

A
More than 12.5 g/cm3
B
More than 5 g/cm3
C
More than 15 g/cm3
D
More than 7.5 g/cm3

B. More than 5 g/cm3

Environmental Issues

Identify the correct option showing the relative contribution of different green house gases to the total global warming.

A
CFC-14%, CO₂-60%, Methane-6%, N₂O-20%.
B
CFC-14%, CO2-60%, Methane-20%, N₂O-6%.
C
CFC-20%, CO₂-60%, Methane-14%, N₂O-6%.
D
CFC-6%, CO2-60%, Methane-20%, N₂O-14%.

B. CFC-14%, CO2-60%, Methane-20%, N₂O-6%.

Sexual Reproduction in Flowering Plants

A flower has 10 stamens each having bilobed dithecous anther. If each microsporangium has 5 pollen mother cells, how many pollen grains would be produced by the flower?

A
1600
B
200
C
400
D
800

D. 800

Biotechnology Principles and Processes

From the following tools / techniques of genetic engineering, identify those which are required for cloning a bacterial gene in animal cells and choose the correct option:

A
II, III, IV, VI, VII, VIII
B
II, III, V, VII, VIII
C
I, II, IV, VI, VIII
D
I, III, IV, V, VII

C. I, II, IV, VI, VIII

Ecosystem

Identify the incorrect statement regarding the flow of energy between various components of the food chain.

A
Each trophic level loses some energy as heat to the environment
B
The amount of energy available at each trophic level is 10% of previous trophic level
C
Energy flow is unidirectional
D
Green plants capture about 10% of the solar energy that falls on leaves

D. Green plants capture about 10% of the solar energy that falls on leaves

Human Health and Diseases

Find out the correct match. Disease Pathogen, Main organ, affected:

A
Dysentery Protozoa Liver
B
Ringworm Fungus Skin
C
Typhoid Bacteria Lungs
D
Filariasis Common round worm Small intestine

B. Ringworm Fungus Skin

Human Health and Diseases

Match the following columns and choose the correct option:

A
1-r, 2-p, 3-q, 4-s
B
1-q, 2-r, 3-s, 4-p
C
1-r, 2-s, 3-p, 4-q
D
1-s, 2-p, 3-q, 4-r

C. 1-r, 2-s, 3-p, 4-q

Anatomy of Flowering Plants

When the vascular cambium is present between the xylem and phloem, then the vascular bundle is called,

A
Closed
B
Exarch
C
Open
D
Endarch

C. Open

Structural Organization in Animals

The function of Typhlosole in earthworm is

A
Increasing the effective area of absorption in the intestine
B
Grinding of soil particles
C
Grinding of decaying leaves
D
Transportation

A. Increasing the effective area of absorption in the intestine

The Living World

Select the correctly matched pair of organisms with their order.

A
Mangifera, indica : Primata
B
Triticum, aestivum : Sapindales
C
Musa, domestica : Diptera
D
Homo, sapiens : Poales

C. Musa, domestica : Diptera

Plant Kingdom

Match the column-I with column-II and choose the correct option from the following:

A
1-q, 2-s, 3-p, 4-r
B
1-s, 2-r, 3-p, 4-q
C
1-r, 2-p, 3-s, 4-q
D
1-q, 2-p, 3-s, 4-r

C. 1-r, 2-p, 3-s, 4-q

Animal Kingdom

Flame cells present in the members of platyhelminthes are specialized to perform,

A
Respiration and Osmoregulation
B
Osmoregulation and Circulation
C
Osmoregulation and Excretion
D
Respiration and Excretion

C. Osmoregulation and Excretion

Morphology of Flowering Plants

Identify the floral formula of plant belonging to potato family.

A
B
C
D

2.

Mineral Nutrition

Toxicity of which micronutrient induces deficiency of iron, magnesium and calcium?

A
Boron
B
Zinc
C
Molybdenum
D
Manganese

D. Manganese

Body Fluids and Circulation

Considering the stroke volume of an adult healthy human being is 70 mL, identify the cardiac output in one hour from the following:

A
50.40 Lit/hour
B
504.0 Lit/hour
C
30.24 Lit/hour
D
302.4 Lit/hour

D. 302.4 Lit/hour

Biological Classification

Function of contractile vacuole in Amoeba is

A
Digestion and excretion
B
Excretion and osmoregulation
C
Digestion and respiration
D
Osmoregulation and movements

B. Excretion and osmoregulation

Biomolecules

Match List-I and List-II with respect to proteins and their functions and select the correct option.

A
1-s, 2-p, 3-r, 4-p
B
1-q, 2-r, 3-q, 4-s
C
1-s, 2-q, 3-r, 4-p
D
1-s, 2-r, 3-q, 4-p

D. 1-s, 2-r, 3-q, 4-p

Cell Cycle and Cell Division

The complex formed by a pair of synapsed homologous chromosomes is called,

A
Univalent
B
Pentavalent
C
Triad
D
Bivalent

D. Bivalent

Transport in Plants

Match Column-I with Column-II. Select the option with correct combination.

A
1-q, 2-s, 3-p, 4-r
B
1-q, 2-s, 3-r, 4-p
C
1-q, 2-r, 3-p, 4-s
D
1-q, 2-p, 3-s, 4-r

A. 1-q, 2-s, 3-p, 4-r

Reproduction in Organisms

In Bryophyllum, the adventitious buds arise from

A
Leaf base
B
Leaf axil
C
Notches in the leaf margin
D
Shoot apex

C. Notches in the leaf margin

Sexual Reproduction in Flowering Plants

Primary endosperm nucleus is formed by fusion of

A
Two polar nuclei and two male gametes
B
Two polar nuclei and one male gamete
C
Ovum and male gamete
D
One polar nucleus and male gamete

B. Two polar nuclei and one male gamete

Body Fluids and Circulation

Identify the option showing the correct labelling for p, q, r and s with reference to the conducting system of the human heart.

A
p- Interventricular septum, q-AVN, r-Bundle of His, s-SAN
B
p-SAN, q-AVN, r-Bundle of His, s-Interventricular septum
C
p-AVN, q-SAN, r-Interventricular septum, s-Bundle of His
D
p-Bundle of His, q-SAN, r-Interventricular septum, s-AVN

p-SAN, q-AVN, r-Bundle of His, s-Interventricular septum

Excretory Products and Their Elimination

Atrial Natriuretic Factor (ANF) acts as a

A
Hypertension inducer
B
Check on Renin-Angiotensin mechanism
C
Promoter on Renin-Angiotensin mechanism
D
Vasoconstrictor

B. Check on Renin-Angiotensin mechanism

Neural Control and Coordination

The vibrations from the ear drum are transmitted through ear ossicles to

A
Auditory nerves
B
Cochlea
C
Oval window
D
Tectorial membrane

Oval window

Reproduction in Organisms

Bamboo species flowers

A
Twice in 50-100 years
B
Every year
C
Once in 12 years
D
Once in lifetime

D. Two polar nuclei and one male gamete

Human Reproduction

With reference to human sperm, match the List-I with List-II. Choose the correct option from the following:

A
1-r, 2-q, 3-s, 4-p
B
1-s, 2-p, 3-q, 4-r
C
1-s, 2-r, 3-p, 4-q
D
1-q, 2-s, 3-r, 4-p

B. 1-s, 2-p, 3-q, 4-r

Sexual Reproduction in Flowering Plants

Which pair of the following cells in the embryo sac are destined to change their ploidy after fertilization?

A
Egg cell and central cell
B
Antipodals and synergids
C
Synergids and egg cell
D
Central cell and antipodals

A. Egg cell and central cell

Human Reproduction

In the female reproductive system, a tiny finger like structure which lies at the upper junction of the two labia minora above the urethral opening is called

A
Vagina
B
Hymen
C
Mons pubis
D
Clitoris

D. Clitoris

Human Reproduction

Consider the following statements with reference to female reproduction system: Statement 1. The presence or absence of hymen is not a reliable indicator of virginity or sexual experience. Statement 2. The sex of the foetus is determined by the father and not by the mother. Choose the correct option from the following:

A
Both the Statement 1 and Statement 2 are wrong.
B
Statement 1 is correct and Statement 2 is wrong.
C
Both the Statement 1 and Statement 2 are correct.
D
Statement 1 is wrong and Statement 2 is correct.

C. Both the Statement 1 and Statement 2 are correct.

Human Reproduction

The male sex accessory ducts include,

A
Rete testis, vasa efferentia, epididymis and vas deferens
B
Rete testis, vasa efferentia, epididymis and seminal vesicle
C
Rete testis, urethra, epididymis and vas deferens
D
Rete testis, vasa efferentia, seminal vesicle and vas deferens

A. Rete testis, vasa efferentia, epididymis and vas deferens

Principles of Inheritance and Variation

Which of the following statements is correct?

A
Female carrier for haemophilia may transmit the disease to sons
B
Thalassemia is a qualitative problem
C
Change in whole set of chromosomes is called aneuploidy
D
Sickle cell anaemia is a quantitative problem

A. Female carrier for haemophilia may transmit the disease to sons

Molecular Basis of Inheritance

Gene-mapping' technology was developed by

A
Mendel
B
Tschermak
C
Correns
D
Sturtvent

D. Sturtvent

Principles of Inheritance and Variation

Find the correct statement. (1) Generally a gene regulates a trait, but sometimes one gene has effect on multiple traits. (2) The trait AB-blood group of man is regulated by one dominant allele and another recessive allele. Hence it is co-dominant.

A
Both the Statements are wrong
B
Statement (1) is correct
C
Statement (2) is correct
D
Both Statements (1) and (2) are correct

B. Statement (1) is correct

Human Reproduction

From the following table, select the option that correctly characterizes various phases of menstrual cycle: Menstruation phase, Follicular phase, Luteal phase;

A
Regeneration of endometrium, High level of progesterone, Developing corpus luteum
B
Matured follicle, Regression of corpus luteum, Ovulation
C
Menses, Developing corpus luteum, Follicle maturation
D
Menses, L.H. Surge, Regeneration of endometrium

Menses, L.H. Surge, Regeneration of endometrium

Reproductive Health

Which of the following is abbreviated as ZIFT ?

A
Zygote Inter Fallopian Tube
B
Zygote Intra Fallopian Transfer
C
Zygote Inter Fallopian Transfer
D
Zygote Intra Fallopian Tube

B. Zygote Intra Fallopian Transfer

Reproductive Health

An example for hormone releasing IUD is

A
Implant
B
LNG-20
C
Multiload 375
D
Lippes loop

B. LNG-20

Reproductive Health

MTPs are considered relatively safe during

A
First trimester
B
Second trimester
C
24 weeks of pregnancy
D
180 days of pregnancy

A. First trimester

Molecular Basis of Inheritance

The Lac-Operon model was elucidated by

A
Jacob and Crick
B
Watson and Crick
C
Francois Jacob and Jaques Monad
D
Hershey and Chase

C. Francois Jacob and Jaques Monad

Evolution

Which of these is NOT an example for Adaptive radiation?

A
Long-necked Giraffe
B
Darwin's finches
C
Australian marsupials
D
Placental mammals

A. Long-necked Giraffe

Evolution

In a population of 800 rabbits showing Hardy-Weinberg equilibrium, the frequency of recessive individuals was 0.16. What is the frequency of heterozygous individuals?

A
0.36
B
0.4
C
0.48
D
0.84

C. 0.48

Principles of Inheritance and Variation

In male heterogametic type of sex determination

A
Males do not produce gametes
B
Male parent produces similar gametes
C
Female parent produces dissimilar gametes
D
Male parent produces dissimilar gametes

D. Male parent produces dissimilar gametes

Principles of Inheritance and Variation

In one of the hybridisation experiments, a homozygous dominant parent and a homozygous recessive parent are crossed for a trait. (Plant shows Mendelian inheritance pattern)

A
Dominant parent trait appears in F2 generation and recessive parent trait appears only in F1 generation
B
Dominant parent trait appears in F1 generation and recessive parent trait appears in F2 generation
C
Dominant parent trait appears in both F1 & F2 generations, recessive parent trait appears in only F2 generation
D
Dominant parent trait appears in F1 generation and recessive parent trait appears in F1 and F2 generations

C. Dominant parent trait appears in both F1 & F2 generations, recessive parent trait appears in only F2 generation

Molecular Basis of Inheritance

Histone proteins are positively charged because they are rich in basic amino acid residues

A
Arginine and Proline
B
Arginine and Alanine
C
Arginine and Lysine
D
Arginine and Phenylalanine

C. Arginine and Lysine

Molecular Basis of Inheritance

Eukaryotic genes are monocistronic but they are split genes because

A
Introns are interrupted with Mutons
B
They contain Exons only
C
They contain Introns only
D
Exons are interrupted by Introns

D. Exons are interrupted by Introns

Strategies for Enhancement in Food Production

Identify from the following a pair of better yielding semi dwarf varieties of rice developed in India

A
Kalyan Sona and Sonalika
B
Jaya and Ratna
C
Sonalika and Ratna
D
Jaya and Kalyan Sona

B. Jaya and Ratna

Strategies for Enhancement in Food Production

In MOET technique fertilized eggs are transferred into surrogate mother in which of the following stage?

A
16-32 celled stage
B
2-4 celled stage
C
8-16 celled stage
D
8-32 celled stage

D. 8-32 celled stage

Microbes in Human Welfare

Roquefort cheese is ripened by

A
Yeast
B
Bacterium
C
Fungi
D
Virus

C. Fungi

Environmental Issues

Four students were assigned a science project to find out the pollution levels of lakes in their surrounding. After analysing the quality of water samples, the BOD values were found as follows: Which among the following water samples is highly polluted ?

A
0.16 mg/L
B
0.6 mg/L
C
0.06 mg/L
D
6 mg/L

D. 6 mg/L

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