A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap?
1. Acidic
2. Alkaline
3. Low refractive index
4. The absence of sugar
Cohesion, adhesion and surface tension provide water with a high tensile strength that means that it:
1. is capable of rising in a thin tube
2. has a low specific heat
3. resists a pulling force
4. is a universal polar solvent
Plants can be grown in (Select the incorrect option)
1. Soil with essential nutrients
2. Water with essential nutrients
3. Either water or soil with essential nutrients
4. Water or soil without essential nutrients
PGA, as the first fixation product, was discovered in photosynthesis of
1. bryophyte
2. gymnosperm
3. angiosperm
4. alga
It can be correctly said about the relation between the absorption spectra of various pigments and the action spectrum of photosynthesis that:
1. | There is a complete one to one overlap between the absorption spectrum of chlorophyll a and the action spectrum of photosynthesis. |
2. | There is a complete one to one overlap between the absorption spectrum of chlorophyll b and the action spectrum of photosynthesis. |
3. | The absorption spectrum of chlorophyll a is wider than the action spectrum of photosynthesis. |
4. | The absorption spectrum of chlorophyll a is narrower than the action spectrum of photosynthesis. |
Sucrose is converted into glucose and fructose by the enzyme:
1. Sucrase | 2. Aldolase |
3. Invertase | 4. Zymase |
A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white-coloured like albinos. Which of the following terms will you use to describe them?
1. Mutated
2. Embolised
3. Etiolated
4. Defoliated
Lichens represent an intimate mutualistic relationship between a fungus and:
1. | an algae | 2. | a cyanobacterium |
3. | a brown alga | 4. | either 1 or 2 |
The first biosphere reserves established in India was:
1. | Nilgiri | 2. | Kanchenjunga |
3. | Gulf of Mannar | 4. | Sunderbans |
The structures that help some bacteria to attach to rocks and/or host tissues are:
1. | Fimbriae | 2. | Mesosomes |
3. | Holdfast | 4. | Rhizoids |
What is a tonoplast?
1. Outer membrane of mitochondria
2. Inner membrane of chloroplast
3. Membrane boundary of the vacuole of plant cells
4. Cell membrane of plant cell
Viruses have :
1. DNA enclosed in a protein coat
2. Prokaryotic nucleus
3. Single Chromosome
4. Both DNA and RNA
During mitosis, endoplasmic reticulum and nucleolus begin to disappear at:
1. | Late metaphase | 2. | Early prophase |
3. | Late prophase | 4. | Early metaphase |
Apocarpous gynoecium is seen in:
1. Lotus | 2. Mustard |
3. Papaver | 4. Tomato |
Imbricate aestivation of floral parts is seen in:
1. | Calotropis | 2. | Cassia |
3. | China rose | 4. | Lady’s finger |
In their phloem tissue, gymnosperms have:
1. Sieve cells and Companion cells
2. Albuminous cells and Sieve cells
3. Sieve tubes and Companion cells
4. Sieve tubes and Albuminous cells
The key features of meiosis include all the following except:
1. | Pairing of heterologous chromosomes |
2. | Crossing over between non sister chromatids of homologous chromosomes |
3. | Four haploid cells produced at the end of the second division |
4. | Initiated after DNA replication in S phase |
Identify the incorrect statement regarding Euglenoids:
1. Majority are found in fresh stagnant water
2. Presence of two flagella
3. Behave as heterotrophs when deprived of sunlight
4. Pigments entirely different from those found in higher plants
In angiosperms, one of the male gametes fuses with the secondary nucleus to produce:
1. Endosperm
2. Zygote
3. Embryo
4. Primary endosperm nucleus
Which of the following would not be true regarding importance of algae?
1. They increase level of dissolved oxygen in water
2. Many can be used as food source
3. They are the source of most antibiotics known to man
4. Products like hydrocolloids [algin] and agar are useful to man
In plant taxonomy, the most inclusive category will be:
1. | Kingdom | 2. | Division |
3. | Class | 4. | Order |
In an embryo sac, the cells that degenerate after fertilisation are:
1. Synergids and primary endosperm cell
2. Synergids and antipodals
3. Antipodals and primary endosperm cell
4. Egg and antipodals
Person with blood group AB is considered as universal recipient because he has:
1.both A and B antigens on RBC but no antibodies in the plasma.
2. both A and B antibodies in the plasma.
3. no antigen on RBC and no antibody in the plasma
4. both A and B antigens in the plasma but no antibodies
Which one is surrounded by callose wall
1. Male gamete
2. Pollen grain
3. Egg
4. Microspore mother cell
Degeneration of genetic code is due to
1. First member of codons
2. Second member of codons
3. Third member of codons
4. Entire codons.
Monosomy means:
1. | Lack of one pair of chromosomes |
2. | Lack of one of any one pair of chromosome |
3. | Presence of an extra chromosome |
4. | Presence of an extra set of chromosomes |
The point mutation in sickle cell anaemia leads to a change in the codon. Identify the correct change:
1. | UGA to UAA | 2. | GUG to GAG |
3. | GAG to GUG | 4. | UAA to UGA |
A genetic cross between homozygous individuals but with different alleles for a single gene of interest is called as:
1. | A reciprocal cross | 2. | Monohybrid cross |
3. | Dihybrid cross | 4. | Test cross |
In actual structure, tRNA is a compact molecule that looks like a/an:
1. | Cloverleaf | 2. | Railroad |
3. | Inverted L | 4. | Alpha helix |
Geitonogamy is:
1. | Functionally cross–pollination but genetically autogamy |
2. | Functionally autogamy but genetically cross-pollination |
3. | Functionally and genetically autogamy |
4. | Functionally and genetically cross-pollination |
In eukaryotes, RNA polymerase III transcribes:
1. | hnRNA, snRNAs and 5.8S RNA |
2. | tRNA, 5.8S RNA and snRNAs |
3. | tRNA, 5SrRNA and snRNAs |
4. | rRNAs – 28S, 18S and 5S |
Which fungus is an important source for the production of citric acid?
1. | Aspergillus niger | 2. | Aspergillus flavus |
3. | Trichodermapolysporum | 4. | Trichodermaharzianum |
DNA replication takes place during :
1. | G1 - phase | 2. | G2 - phase |
3. | S - phase | 4. | Prophase |
For the commercial and industrial production of Citric Acid, which of the following microbes is used?
(1) Aspergillus niger
(2) Lactobacillus sp
(3) Saccharomyces cerevisiae
(4) Clostridium bretylium
Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing it is called.
1. Morbidity.
2. Fecundity.
3. Biotic potential.
4. Environmental resistance.
Cuscuta is an example of
1. predation.
2. endoparasitism.
3. ectoparasitism.
4. brood parasitism.
Deforestation has affected the carbon cycle primarily by:
1. | decreasing the amount of carbon available for photosynthesis |
2. | increasing the rate of release of carbon dioxide into the atmosphere |
3. | preventing the loss of fixed carbon to sediments |
4. | reducing the decomposition of organic matter by microbes |
The UN Conference of Parties on climate change in the year 2011 was held in:
1. South Africa
2. Peru
3. Qatar
4. Poland
dB is a standard abbreviation used for the quantitative expression of
1. A particular pollutant
2. The dominant Bacillus in a culture
3. Certain pesticides
4. The density of bacteria in a medium
The concentration of ozone in the stratosphere is normally lowest during the period:
1. February - April
2. May - July
3. July - October
4. November - January
Vacuole in a plant cell
1. Lacks membrane and contains air.
2. Lacks membrane and contains water and excretory substances.
3. Is membrane bound and contains storage proteins and lipids.
4. Is membrane bound and contains water and excretory substances.
Best material for the study of mitosis in laboratory is
1. anther
2. root tip
3. leaf tip
4. ovary
During microsporogenesis, meiosis occurs in:
1. | Endothecium | 2. | Microspore mother cells |
3. | Microspore tetrads | 4. | Pollen grains |
R and Y genes of Maize lie very close to each other. When RRYY and rryy genotype are hybridised, F2 generation will show
1. Segregation in 9: 3 : 3 : 1 ratio
2. Segregation is 3 : 1 ratio
3. Higher number of parental types
4. Higher number of recombinant types
The hilum is a scar on the:
1. Fruit, where it was attached to pedicel
2. Fruit, where style was present
3. Seed, where micropyle was present
4. Seed, where funicle was attached
The repressor of the lac operon is:
1. | Lactose itself | 2. | A steroid |
3. | Synthesized constitutively | 4. | A product of structural gene |
Histones are rich in amino acids:
1. | Arginine and Lysine |
2. | Arginine and Leucine |
3. | Arginine and Isoleucine |
4. | Aspartate and Glutamate |
Better yielding semi-dwarf varieties of rice developed in India are:
1. Sonalika and KalyanSona
2. IR – 8
3. Taichung native – 1
4. Jaya and Ratna
A major disadvantage of external fertilization is:
1. | Lack of variation in the progeny |
2. | The number of progeny produced can only be one or few |
3. | The offspring are extremely vulnerable to predators threatening their survival up to adulthood |
4. | The progeny have a very short life span and a low reproductive potential |
Mammals are the descendents of the reptilian group :
1. Therapsids
2. Thecodonts
3. Pelycosaurs
4. Dinosaurs
Genetically engineered bovine (bST), sometimes called rbST (recombinant bovine somatotropin) or rbGH (recombinant bovine growth hormone) are used in
1. therapeutic drugs
2. agriculture
3. dairy industry
4. DNA fingerprinting
The principal nitrogenous excretory compound in humans is synthesized
1. in kidneys but eliminated mostly through liver
2. in kidneys as well as eliminated by kidneys
3. in liver and also eliminated by the same through bile
4. in the liver, but eliminated mostly through kidneys
What is true of urea biosynthesis?
1. Uric acid is the starting point
2. Urea is synthesized in lysosomes
3. Urea cycle enzymes are located inside mitochondria
4. Urea is synthesized in the kidney
Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of
1. diaphragm
2. neck
3. tongue
4. epiglottis
The primary dentition in humans differs from permanent dentition in not having one of the following type of teeth
1. Canine
2. Premolars
3. Molars
4. Incisors
Medical Termination of Pregnancy (MTP) is considered safe up to how many weeks of pregnancy?
1. | Twelve weeks | 2. | Eighteen weeks |
3. | Six weeks | 4. | Eight weeks |
In sea urchin DNA, which is double stranded, 17% of the bases were shown to be cytosine. The percentages of the other three bases expected to be present in this DNA are :
1. G 17%, A 16.5%,T32.5%
2. G 17%, A 33%,T 33%
3. G8.5%,A50%, T24.5%
4. G 34%,A 24.5%,T 24.5%
Which group of animals belong to the same phylum?
1. Earthworm, Pinworm, Tapeworm
2. Prawn, Scorpion, Locusta
3. Sponge, Sea anemone, Starfish
4. Malarial parasite, Amoeba, Mosquito
Which of the following pairs of animals has non glandular skin?
1. Snake and Frog
2. Chameleon and Turtle
3. Frog and Pigeon
4. Crocodile and Tiger
Areolar connective tissue joins
1. integument to the muscles
2. bones to the muscles
3. bones to the bones
4. fat body to the muscles
Match the following and choose the correct option:
A. Adipose tissue i. Nose
B. Stratifled ii. Blood
C. Hyaline iii. Skin
D. Fluid connective tissue iv. Fat storage
Options:
1. A-i, B-ii, C-iii, D-iv
2. A-iv B-iii, C-i, D-ii
3. A-iii, B-i, C-iv, D-ii
4. A-ii, B-i, C-iv, D-iii
Golden rice is:
1. | A variety of rice grown along the yellow river in China |
2. | Long stored rice having yellow colour tint |
3. | A transgenic rice having a gene for β - carotene |
4. | Wild variety of rice with yellow coloured grains |
Which part of poppy plant is used to obtain the drug "Smack"?
1. Flowers
2. Leaves
3. Roots
4. Latex
Which body of the Government of India regulates GM research and safety of introducing GMO for public services?
1. Indian Council of Agricultural Research
2. Genetic Engineering Approval Committee
3. Research Committee on Genetic Manipulation
4. Bio-safety committee
1. | Bone marrow & Spleen | 2. | Bone marrow & Thyroid |
3. | Lymph nosed & Spleen | 4. | Bone marrow & thymus |
Which of the following does not have the ability to replicate within bacterial cells independent of the control of chromosomal DNA?
1. | Plastid | 2. | Bacteriophages |
3. | BAC | 4. | Plasmid |
Parkinson’s disease (characterized by tremors and progressive rigidity of limbs) is caused by degeneration of brain neurons that are involved in movement control and make use of neurotransmitter
1. Norepinephrine
2. Acetylcholine
3. GABA
4. Dopamine
A drop of each of the following is placed separately on four slides. Which of them will not coagulate?
1. Whole blood from pulmonary vein
2. Blood plasma
3. Blood serum
4. Sample from the thoracic duct of lymphatic system
All of the following are true of protein denaturation except that it
1. is a shape change
2. is always irreversible
3. may be caused by a pH change
4. could result from a temperature change
In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive
1. K+ and Na+ out of the cell.
2. Na+ into the cell.
3. Na+ out of the cell.
4. K+ into the cell.
The contractile protein of skeletal muscle involving ATPase activity is
1. Tropomyosin
2. Myosin
3. α- Actinin
4. Troponin
With respect to their actions on blood glucose levels, the functions of glucagon and insulin can be regarded as:
1. Antagonistic
2. Synergistic
3. Permissive
4. Competitive inhibition
Chylomicrons are:
1. | small protein coated fat globules formed in the intestinal epithelium |
2. | small protein coated fat globules formed in the lacteals of the villi |
3. | small fat coated protein globules formed in the intestinal epithelium |
4. | small fat coated protein globules formed in the lacteals of the villi |
What causes the onset of puberty in males?
1. | Increase in secretion of testosterone by the testis |
2. | Decrease in the secretion of testosterone by the testis |
3. | Increase in secretion of GnRH by the hypothalamus |
4. | Decrease in the secretion of GnRH by the hypothalamus |
In humans, the sex of the baby is determined:
1. | At the time of fertilization and by the father |
2. | At the time of fertilization and by the mother |
3. | At the time of implantation and by the father |
4. | At the time of implantation and by the mother |
Emergency contraceptive methods must be employed within:
1. | 72 hours of ovulation |
2. | 72 hours of the onset of menstrual flow |
3. | 72 hours of unprotected coitus |
4. | 72 hours of cessation of menstrual flow |
The myelin sheath around the axons is secreted in the CNS by:
1. Schwann cells
2. Oligidendrocytes
3. Microglial cells
4. Astrocytes
Myelin sheath around the axons in the PNS is secreted by:
1. oligodendrocytes | 2. axons |
3. Schwann cells | 4. ependymal |
With the help of ECG tracings, the heart rate of the person can be calculated by:
1. measuring the size of the PR or PQ interval
2. counting the number of QRS complexes in a given period of time
3. counting the number of T waves between two successive QRS complexes
4. measuring the size of the QRS complexes
The partial pressure of oxygen in oxygenated blood is about:
1. 104 mmHg | 2. 100 mmHg |
3. 95 mmHg | 4. 40 mmHg |
The functions of human kidneys do not include:
1. Secretion of renin to regulate GFR and blood pressure.
2. Activating vitamin D.
3. Site of maximum gluconeogenesis in the body.
4. Production of erythropoietin that stimulates bone marrow.
The dark and light bands seen as striations in a skeletal muscle are located on:
1. | Myofilaments | 2. | Muscle fiber |
3. | Myofibril | 4. | Motor unit |
Match the follwing columns and select the correct option .
Column-l Column-ll
(a) Placenta (i) Androgens
(b) Zona pellucida (ii) Human chroinic
(c) Bulbo-urethral Gonadotropin
glands (iii) Layer of the ovum
(d) Leydig cells (iv) Lubrication of the Penis
a b c d
(1) (i) (iv) (ii) (iii)
(2) (iii) (ii) (iv) (i)
(3) (ii) (iii) (iv) (i)
(4) (iv) (iii) (i) (ii)
In-gel electrophoresis, separated DNA fragments can be visualized with the help of:
1. Ethidium bromide in UV radiation
2. Acetocarmine in UV radiation
3. Ethidium bromide in infrared radiation
4. Acetocarmine in bright blue light
Photosensitive compound in human eye is made up of
1. Opsin and Retinal
2. Opsin and Retinol
3. Transducin and Retinene
4. Guanosine and Retinol
Which one of the following is a sesamoid bone?
1. Pelvis
2. Patella
3. Pterygoid
4. Pectoral girdle
The figure given below depicts a diagrammatic sectional view of the female reproductive system of humans. Which one set of three parts out of A-F have been correctly identified?
1. C-lnfundibulum, D-Fimbriae, E-Cervix
2. D-Oviducal funnel, E-Uterus, F-Cervix
3. A-Perimetrium, B-Myometrium, C-Fallopian tube
4. B-Endometrium, C-Infundibulum, D-Fimbriae
Which one of the following has an open circulatory system?
1. Pheretima
2. Periplaneta
3. Hirudinaria
4. Octopus
Which of the following statements is correct?
1. Monkey, apes and humans exhibit estrous cycle.
2. Urine is pale yellow and slightly alkaline.
3. Lots of enzymes are present in bile juice.
4. Ovulation in humans is spontaneous
Identify the incorrectly matched pair:
restriction enzyme recognition site
1. EcoRI 5’GAATTC3’
3’CTTAAG5’
2. HindII 5’GTPyPuAC3’
3’CAPuPyTG3’
3. SmaI 5’GGATTC3’
3’CTTAGG5’
4. HindIII 5’AAGCTT3’
3’TTCGAA5’
Given below is a schematic metabolic pathway. In an experiment, the concentration of enzyme 1 was increased but the concentration of enzymes 2 and 3 were kept constant. What would happen to the rate of production of D?
1. it would go down
2. it would go up
3. it would stay the same
4. it would stop
A person with sickle cell anemia is:
1. | more prone to malaria. | 2. | more prone to typhoid. |
3. | less prone to malaria. | 4. | less prone to typhoid. |
Random genetic drift in a population probably results from
1. highly genetically variable individuals.
2. inbreeding within this population
3. constant low mutation rate
4. large population size
An allele that reduces the fitness of organisms is found to decrease very rapidly in a population. Most likely this allele is:
1. recently mutated
2. rare
3. dominant
4. recessive
In some African populations, the frequency of the sickle cell allele in the human population is much higher than normal. This can be an example of:
1. | gene flow | 2. | heterozygote advantage |
3. | genetic drift | 4. | nonrandom mating |
Self pollination leading to self fertilization in a plant will be an extreme example of:
1. bottleneck effect
2. founder effect
3. out breeding
4. assortative mating
The portal systems seen in humans include:
I. Hepatic portal system
II. Renal portal system
III. Hypothalamic Hypophyseal portal system
1. I and II only | 2. I and III only |
3. II and III only | 4. I, II and III |
Match type of synovial joint in Column I with correct example in Column II and select the correct answer from the codes given below:
COLUMN I | COLUMN II | ||
A. | Ball and socket | a. | Gleno-humeral joint |
B. | Gliding | b. | First carpometacarpal joint |
C. | Saddle | c. | Between carpal bones |
D. | Condyloid | d. | Metacarpophalangeal joint |
Codes
A | B | C | D | |
1. | d | c | b | a |
2. | d | b | c | a |
3. | a | c | b | d |
4. | a | b | c | d |
Select the incorrect statement
1. Inbreeding helps in accumulation of superior genes and elimination of undesirable genes
2. Inbreeding is essential homozygosity
3. Inbreeding is essential to evolve purelines in any animal
4. Inbreeding selects harmful recessive genes that reduce fertility and productivity