Consider the following statements:
I. | Pure water is usually defined as having a solute potential (Ψπ)of zero. |
II. | A solution will have a lower and hence more negative water potential than that of pure water. |
III. | The more solute molecules present, the more negative the solute potential is. |
Correct statements are:
1. I and II
2. I and III
3. II and III
4. I, II and III
The greatest contribution of root pressure in water transport in plants most likely is that it:
1. | pushes water to the top at night |
2. | pushes water to the top of the plant when the rate of transpiration is low |
3. | re-establishes the continuous chain of water molecules in the xylem |
4. | pushes water into the endodermal cells changing the transport from apoplast to symplast |
Which one of the following statements can best explain the term critical concentration of an essential element?
1. Essential element concentration below which plant growth is retarded.
2. Essential element concentration below which plant growth becomes stunted.
3. Essential element concentration below which plant remains in the vegetative phase.
4. None of the above
The oxygen evolved during photosynthesis comes from water molecules. Which one of the following pairs of elements are involved in this reaction?
1. Manganese and chlorine
2. Manganese and potassium
3. Manganese and molybdenum
4. Manganese and calcium
In photosynthesis, the light-independent reactions take place at
1. thylakoid lumen | 2. photosystem l |
3. photosystem ll | 4. stromal matrix |
Plants can get along without respiratory organs. What may be the reason/s for this?
I. Each plant part takes care of its own gas exchange needs
II. Plants do not present great demands for gas exchange
1. Both I and II | 2. Only I |
3. Only II | 4. Neither I nor II |
You are given a tissue with its potential for differentiation in an artificial culture. Which of the following pairs of hormones would you add to the medium to secure shoots as well as roots?
1. IAA and gibberellin
2. Auxin and cytokinin
3. Auxin and abscisic acid
4. Gibberellin and abscisic acid
If global warming continues, how would the distributional range of some species be affected?
1. There will be a poleward shift
2. There will be an equatorial shift
3. No change is expected for any species
4. There will be shift from land to marine water
Which of the following is not an ectoparasite?
1. Lice on humans
2. Copepods on marine fishes
3. Mistletoe on other plants
4. Female Anopheles on humans
The last natural refuge of the Manipur brow antlered deer (Cervus eldi eldi), locally called sangai - the dancing deer of Manipur is the floating national park called:
1. Keoladeo national park
2. Keibul Lamjao National Park
3. Khangchendzonga National Park
4. Campbell Bay National Park
In 'S' phase of the cell cycle:
1. amount of DNA doubles in each cell.
2. amount of DNA remains same in each cell.
3. chromosome number is increased
4. amount of DNA is reduced to half in each cell.
Which of the following dyes is best suited for staining chromosomes?
1. Basic Fuchsine
2. Safranin
3. Methylene blue
4. Carmine
Archaebacteria differ from eubacteria in:
1. Cell membrane structure
2. Mode of nutrition
3. Cell shape
4. Mode of reproduction
At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?
1. During telophase
2. During S-phase
3. During G2 stage of prophase
4. During entire prophase
Match each item in Column I regarding structure of a dicotyledonous seed with description in Column II and select the correct option from the codes given below:
|
COLUMN I |
|
COLUMN II |
A |
Testa |
a |
Outer layer of seed coat |
B |
Tegmen |
b |
Inner layer of seed coat |
C |
Hilum |
c |
Scar on seed coat through which the developing seeds were attached to the fruit |
D |
Micropyle |
d |
Small pore through which pollen tube penetrates |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | b | a | d | c |
4. | a | b | d | c |
The ovary is said to be half inferior in all the following except:
1. Mustard
2. Rose
3. Plum
4. Peach
The term ‘stele’in a dicot root does not include:
1. | Endodermis | 2. | Pericycle |
3. | Vascular bundles | 4. | Pith |
Match each item in Column I with one in Column II and select the correct answer from the codes given below:
Column I |
|
Column II |
|
A |
Zygotene |
a |
Pairing of homologous chromosomes |
B |
Pachytene |
b |
Appearance of chiasma |
C |
Diplotene |
c |
Terminalization of chiasma |
D |
Diakinesis |
d |
Crossing over |
Codes
A | B | C | D | |
1. | a | c | b | d |
2. | a | d | b | c |
3. | a | b | c | d |
4. | b | c | d | a |
In meiosis:
1. A single round of DNA replication is followed by two sequential divisions with chromosome number and DNA content getting reduced twice
2. A single round of DNA replication is followed by two sequential divisions with chromosome number getting reduced twice and DNA content getting reduced once
3. A single round of DNA replication is followed by two sequential divisions with chromosome number getting reduced once and DNA content getting reduced twice
4. A single round of DNA replication is followed by two sequential divisions with chromosome number and DNA content getting reduced once
The disease caused by prions in humans is known as:
1. Bovine spongiform encephalopathy
2. Scrapie
3. CJD [Creutzfeldt Jakob Disease]
4. Infectious mononucleosis
The bryophytes are also called as the amphibians of plants kingdom mainly because:
1. they respire through the moist epidermis
2. they depend on water for sexual reproduction
3. they require more water than most plants
4. they lack true roots
A species evolutionary history will form the basis of classification that is:
1. Biological
2. Phylogenetic
3. Artificial
4.Cladistic
Choose the correct statement from the following:
1. | Cleistogamous flowers always exhibit autogamy |
2. | Chasmogamous flowers always exhibit geitonogamy |
3. | Cleistogamous flowers exhibit both autogamy and geitonogamy |
4. | Chasmogamous flowers never exhibit autogamy |
Which of the following is wrongly matched in the given table?
Microbe |
Product |
Application |
|
1. |
Trichoderma polysporum |
Cyclosporin A |
Immunosuppressive drug |
2. |
Monascus purpureus |
Statins |
Lowering of blood cholesterol |
3. |
Streptococcus |
Streptokinase |
Removal of clot from blood vessel |
4. |
Clostridium butylicum |
Lipase |
Removal of oil stains |
Which Mendelian idea is depicted by a cross in which the F1 generation resembles both the parents?
1. law of dominance
2. inheritance of one gene
3. co-dominance
4. incomplete dominance
Pollen tablets are available in the market for:
1. In vitro fertilization
2. Breeding programmes
3. Supplementing food
4. Ex situ conservation
The diagram shows an important concept in the genetic implication of DNA. Fill in the blanks A to C.
1. A - translation B - transcription C - Erevin Chargaff
2. A -transcription B - translation C - Francis Crick
3. A - translation B - extension C - Rosalind Franklin
4. A - transcription B - replication C - James Watson
The F1 progeny in monohybrid crosses by Mendel resembled:
1. | The parent exhibiting the dominant trait completely |
2. | The parent exhibiting recessive trait comp |
3. | The parent exhibiting the dominant trait partly |
4. | The parent exhibiting recessive traits partly |
An individual affected with Turner’s Syndrome:
I. | Is a female |
II. | Has 45 chromosomes |
III. | Has rudimentary ovaries |
Of the above statements, the correct statements are:
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
Thalassemia is inherited as a/an ____________ condition.
1. | Autosomal recessive | 2. | Autosomal dominant |
3. | Sex linked recessive | 4. | Sex linked dominant |
DNA replication is correctly described as:
1. | Semi-conservative and Continuous |
2. | Semi-conservative and Discontinuous |
3. | Conservative and Continuous |
4. | Semi-conservative and Semi-discontinuous |
What is true about the vegetative cell in the pollen tube?
1. | It is smaller than the generative cell |
2. | It has an irregular shaped nucleus |
3. | It floats in the cytoplasm of the generative cell |
4. | It has a dense cytoplasm lacking food reserves |
An RNA primer is essential for DNA synthesis carried out by DNA polymerase III. This is because, to synthesize DNA, DNA polymerase III requires:
1. | A free 3’ – PO4 group |
2. | A free 5’ – PO4 group |
3. | A free 3’ – OH group |
4. | A free 5’ – OH group |
What important nutrient is added to the curd that is produced with the help of LAB [Lactic Acid Bacteria]?
1. | Vitamin A | 2. | Cyanocobalamin |
3. | Essential amino acids | 4. | Essential fatty acids |
Match the following RNA polymerases with their transcribed products:
Column-I |
Column-II |
||
(a) |
RNA polymerase I |
(i) |
tRNA |
(b) |
RNA polymerase II |
(ii) |
rRNA |
(c) |
RNA polymerase III |
(iii) |
hnRNA |
Select the correct option from the following:
1. (a)-(i), (b)-(iii), (c)-(ii)
2. (a)-(i), (b)-(ii), (c)-(iii)
3. (a)-(ii), (b)-(iii), (c)-(i)
4. (a)-(iii), (b)-(ii), (c)-(i)
The dry weight of living organisms is mainly made up of:
1. | Water | 2. | Calcium |
3. | Nitrogen | 4. | Carbon |
The organization which published the Red List of species is :
1. ICFRE
2. IUCN
3. UNEP
4. WWF
According to Central Pollution Control Board (CPCB), Which particulate size in diameter (in
micrometres) of the air pollutants is responsible for greatest harm to human health
1. 1•0 or less
2. 5•2-2•5
3. 2•5 or less
4. 1•5 or less
Radiatively active gases do not include:
1. Methane
2. Ammonia
3. Nitrous oxide
4. Chloroflouro carbons
Which of the following is not a constituent of cell membrane?
1. Glycolipids
2. Phospholipids
3. Cholesterol
4. Proline.
The number of correct statements amongst the given statements would be:
I. The outer nuclear membrane is usually continuous with ER and also bears ribosomes
II. Nuclear pores allow movement of RNA and proteins in both directions between nucleus and cytoplasm
III. Satellite chromosomes have non-staining secondary constrictions at constant locations
IV. Microbodies are membrane bound vesicles containing various enzymes and are present in both plant and animal cells
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
The embryo sac is to ovule as _______ is to an anther.
1. | Stamen | 2. | Filament |
3. | Pollen grain | 4. | Androecium |
In Mendel’s experiments with Garden Pea, round seed shape (RR) was dominant over wrinkled seeds (rr), yellow cotyledons (YY) were dominant over green cotyledons (yy). What is the expected phenotype in F2 generation after the crossing of RRYY x rryy?
1. | Only wrinkled seeds with green cotyledons |
2. | Only wrinkled seeds with yellow cotyledons |
3. | Only round seeds with green cotyledons |
4. | Round seeds with yellow cotyledons and wrinkled seeds with green cotyledons. |
In a type of apomixis known as adventive embryony, embryos develop directly from:
1. Nucellus or integument
2. Zygote
3. Synergids of antipodals of embryo sac
4. Accessory embryo sac in the ovule
A failure in cell division after DNA replication results in:
1. | Point mutation | 2. | Aneuploidy |
3. | Polyploidy | 4. | Apoptosis |
In the genetic code, the codon UUC codes for:
1. | Methionine | 2. | Phenylalanine |
3. | Tyrosine | 4. | Valine |
Plant tissue culture is based on:
1. | cellular totipotency | 2. | indeterminate growth |
3. | phenotypic plasticity | 4. | secondary growth |
Identify the incorrectly matched pair:
|
Organism |
Chromosome number in a meiocyte |
1. |
Ophioglossum |
630 |
2. |
Housefly |
12 |
3. |
Maize |
20 |
4. |
Butterfly |
380 |
Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as -
1. Character displacement
2. Altruism
3. Resource partitioning
4. Competitive exclusion
Select the correct match
1. Phenylketonuria - Autosomal dominant trait
2. Sickle cell anemia - Autosomal recessive trait chromosome - 11
3. Thalassemia - X linked
4. Haemophilia - Y linked
A sort of alternation and generation seen in Cnidarians is termed as:
1. Metamorphosis
2. Epiboly
3. Metagenesis
4. Anagenesis
Which of the following match is correct
Hormone | Effect |
1. Oxytocin | Milk ejection hormone |
2. Glucagon | Decreases blood sugar level |
3. Adrenaline | Decreases heart rate |
4. Thyroxine | Decreases BMR |
Reduction in pH of the blood will
1. reduce the blood supply to the brain
2. decrease the affinity of hemoglobin with oxygen
3. release bicarbonate ions by the liver
4. reduce the heart rate
Which one of the following is not a part of a renal pyramid?
1. Convoluted tubules
2. Collecting ducts
3. Loop of Henle
4. Peritubular capillaries
Which part of the nephrons is impermeable to water?
1. Proximal convoluted tubule
2. Distal convoluted tubule
3. Ascending limb of loop of Henle
4. Descending limb of loop of Henle
The black pigment in the eye which reduces the internal reflection is located in
1. retina
3. cornea
2. iris
4. sclerotic
Which of the following digestive juices has the minimum pH value?
1. Bile
2. Gastric juice
3. Saliva
4. Pancreatic juice
The Leydig cells as found in the human body are the secretory source of:
1. | progesterone | 2. | intestinal mucus |
3. | glucagon | 4. | androgens |
One of the legal methods of birth control is
1. abortion by taking an appropriate medicine
2. by abstaining from coitus from day 10-17 of the menstrual cycle
3. by having coitus at the time of day break
4. by a premature ejaculation during coitus
Pick out the correct match
1. | Sternum | 14 |
2. | Pelvis | 3 |
3. | Ribs | 20 |
4. | Face | 5 |
Which one of the following is a non-reducing carbohydrate?
1. | Maltose |
2. | Sucrose |
3. | Lactose |
4. | Ribose 5-phosphate |
One very special feature in earthworm (Pheretima) is that –
1. Fertilisation for eggs occurs inside the body
2. The typhlosole greatly increases the effective absorption area of the digested food in the intestine
3. The S- shaped setae embedded in the integument are the defensive weapons used against the enemies
4. It has a long dorsal tubular heart
Water exits from a sponge through the:
1. | Spicule | 2. | Choanocyte |
3. | Amoebocyte | 4. | Osculum |
Which cartilage is present at the end of long bones?
1. Calcified cartilage | 2. Hyaline cartilage |
3. Elastic cartilage | 4. Fibrous cartilage |
Which one of the following is not a connective tissue?
1. Bone
2. Cartilage
3. Blood
4. Muscles
The site of production of ADA in the body is:
1. | Erythrocytes | 2. | Lymphocytes |
3. | Blood plasma | 4. | Osteocytes |
Match the following sexually transmitted diseases (Column -I) with their causative agent (Column - II) and select the Correct option.
Column - I |
Column - II |
||
(a) |
Gonorrhea |
(i) |
HIV |
(b) |
Syphilis |
(ii) |
Neisseria |
(c) |
Genital Warts |
(iii) |
Treponema |
(d) |
AIDS |
(iv) |
Human Papilloma - Virus |
Options:
(a) |
(b) |
(c) |
(d) |
|
1. |
(ii) |
(iii) |
(iv) |
(i) |
2. |
(iii) |
(iv) |
(i) |
(ii) |
3. |
(iv) |
(ii) |
(iii) |
(i) |
4. |
(iv) |
(iii) |
(ii) |
(i) |
In vitro clonal propagation in plants is characterized by:
1. PCR and RAPD
2. Northern blotting
3. Electrophoresis and HPLC
4. Microscopy
The class of antibodies involved in allergic response is:
1. | IgA | 2. | IgG |
3. | IgE | 4. | IgM |
For the multiplication of any alien piece of DNA in an organism, it needs to be part of a chromosome that has a specific:
1. | Telomeric sequence | 2. | Multiple cloning sites |
3. | Ori | 4. | Selectable marker |
Which one of the following hormones is a modified amino acids?
1. Progesterone | 2. Prostaglandin |
3. Oestrogen | 4. Epinephrine |
The high energy bonds in an ATP molecule are between :
1. Ribose and nitrogenous base
2. Nitrogenous base and phosphate
3. Ribose and phosphate
4. Phosphate groups
In males, androgens like testosterone secreted by Leydig cells in testes do not:
1. regulate the development, maturation and functions of the male accessory sex organs
2. control the development and regulation of the secondary sexual characters
3. play a major stimulatory role in the process of spermatogenesis
4. produce catabolic effects on protein and carbohydrate metabolism
Which of the following would not be classified as an accessory digestive gland?
1. Liver
2. Crypts of Lieberkuhn
3. Pancreas
4. Salivary glands
The division of primary oocyte results in:
1. | unequal cells – a smaller haploid secondary oocyte and a larger diploid polar body |
2. | unequal cells – a larger haploid secondary oocyte and a smaller haploid polar body |
3. | unequal cells – a smaller diploid secondary oocyte and a larger haploid polar body |
4. | equal cells – a haploid secondary oocyte and a haploid polar body |
When a neuron is resting, the axonal membrane is comparatively:
1. More permeable to sodium ions than for potassium ions
2. More permeable to potassium ions than for sodium ions
3. Equally permeable for potassium and sodium ions
4. Impermeable to sodium and potassium ions
Zona pellucida is a membrane surrounding:
1. | Secondary oocyte | 2. | Secondary follicle |
3. | Corona Radiata | 4. | Trophoblast cells |
The most important measure to check the population explosion in India is:
1. | Enforce one child norm by law with strict penalties for non-compliance |
2. | Progressively increasing the statutory marriage age in males to 25 years |
3. | Motivate smaller families by using contraceptive methods |
4. | Allowing pre-natal sex determination to encourage selective feticide |
The cerebrospinal fluid, present in the ventricles, central canal and sub-arachanoidspace is produced by the capillaries of the:
1. lateral ventricle
2. arachnoid villi
3. choroid plexus
4. dural sinus
A person has type A antigen on RBC and anti-B antibodies in plasma. He can receive blood from a person with blood group:
1. | A and O | 2. | AB, A, B and O |
3. | B and O | 4. | Only O |
Phonation is the function of:
1. | Larynx | 2. | Pharynx |
3. | Muscles of lips and tongue | 4. | Sinuses in the bones |
A person has a cardiac output of 6000 ml per minute and 20% of this is received by kidneys. What is the renal plasma flow per minute?
1. 1200 ml | 2. 660 ml |
3. 400 ml | 5. 120 ml |
Accumulation of uric acid in joints will lead to:
1. | Rheumatoid arthritis | 2. | Osteoarthritis |
3. | Osteomalacia | 4. | Gouty arthritis |
Match the following techniques or instruments with their usage:
Column I | Column II | ||
(a) | Bioreactor | (i) | Separation of DNA fragments |
(b) | Electrophoresis | (ii) | Production of large quantities of products |
(c) | PCR | (iii) | Detection of pathogens, based on antigen-antibody reaction |
(d) | ELISA | (iv) | Amplification of nucleic acids |
Select the correct option from the following:
1. | (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i) |
2. | (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii) |
3. | (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i) |
4. | (a)-(ii), (b)-(i), (c)-(iii), (d)-(iv) |
Receptor sites for neurotransmitters are present on
1.membranes of synaptic vesicles
2. pre-synaptic membrane
3. tips of axons
4. post-synaptic membrane
Select the correct matching of the type of the joint with the example in the human skeletal system
1. Cartilaginous joint - between frontal and parietal
2. Pivot joint - between third and fourth Cervical vertebrae
3. Hinge joint - between humerus and pectoral girdle
4. Gliding joint - between carpals
Which one of the following statements is correct regarding blood pressure?
1. 100/55 mm Hg is considered an ideal blood pressure
2. 105/50 mm Hg makes one very active
3. 190/110 mm Hg may harm vital organs like brain and kidney
4. 130/90 mm Hg is considered high and requires treatment
Which one of the following events is correctly matched with the time period in a normal menstrual cycle?
1. | Release of egg: 5th day |
2. | Endometrium regenerates: 5 - 10 days |
3. | Endometrium secretes nutrients for implantation: 11-18 days |
4. | Rise in progesterone level: 1 - 15 days |
During muscular contraction, which of the following events occur?
(i) H-zone disappears
(ii) A band widens
(iii) I band reduces in width
(iv) Width of A band is unaffected
(v) M line and Z line come closer
1. | (i), (iii), (iv) and (v) | 2. | (i), (ii) and (v) |
3. | (ii), (iv) and (v) | 4. | (i), (ii) and (iii) |
A DNA library is:
1. | information in a computer database about all the genes sequenced so far |
2. | a collection of vectors in a molecular biology lab |
3. | a collection of fragments of DNA that make up the entire genome of an organism |
4. | all the restriction sites put together on a DNA fragment |
Glycogen is a homopolymer made of
1. Glucose units
2. Galactose units
3. Ribose units
4. Amino acids
Which of the following is not lymphoid tissue?
1. | Spleen | 2. | Tonsils |
3. | Pancreas | 4. | Thymus |
A group of animals that are related by descent and share many similarities is referred to as:
1. | breed | 2. | race |
3. | variety | 4. | species |
Industrial melanism is an example of
1. drug resistance
2. darkening of skin due to smoke from industries
3. protective resemblance with the surroundings
4. defensive adaptation of skin against ultraviolet radiations.
Invertebrates were formed and were active by the time of:
1. | 200 mya | 2. | 300 mya |
3. | 400 mya | 4. | 500 mya |
During which period of the geological time scale did the first seed plants evolve?
1. Carboniferous
2. Triassic
3. Jurassic
4. Cretaceous
The type of natural selection that operates to eliminate intermediate phenotypes in a population is known as:
1. | Directional selection | 2. | Disruptive selection |
3. | Stabilizing selection | 4. | Reverse selection |
For normal fertility, what percent of the sperm in ejaculate must exhibit vigorous motility?
1. | 20 | 2. | 30 |
3. | 40 | 4. | 60 |
The enzyme that activates fibrinogens in the blood is:
1. | Thromboplastin | 2. | Thrombokinase |
3. | Thrombin | 4. | Plasmin |