General Biology
Practice m.c.q for various competitive examinations including all india premedical and other entrance examinations.
Questions
Female oral contraceptive pill 'Saheli' was developed by
- IICB Kolkatta
- AIIMS Delhi
- CDRI Lucknow
- CSIR Delhi
In order to analyse the genotype of an organism, it is made to cross with
- dominant parent
- recessive parent
- heterozygous hybrid
- same plant
Differentiation of callus requires a specific ratio of which two hormones?
- Auxin and Gibberellins
- Auxin and Abscisic acid
- IAA and Cytokinin
- Gibberellin and Abscisic acid
Based on the nature of coelom, round worms are
- acoelomate
- haemocoelomate
- pseudocoelomate
- eucoelomate
The heat stable enzyme used in PCR obtained from Thermophilous aquaticus bacteria is
- DNA polymerase III
- Restriction endonuclease
- Topoisomerase
- Taq polymerase
The term stress hormone is used to refer
- ethylene
- ABA
- gibberellins
- IAA
Which of the following is not a carbohydrate?
- Glucose
- Starch
- Hemoglobin
- Cellulose
Which of the following organs is known as the grave yard of RBC's?
- Kidney
- Bone marrow
- Tonsil
- Spleen
Non coding sequence present within a structural gene is called
- exon
- intron
- cistron
- muton
Which of the following antibodies can cross the placenta?
- IgA
- IgG
- IgD
- IgM
A mineralocorticoid that stimulates the kidney to conserve sodium and to excrete potassium is
- aldosterone
- cortisone
- cortisol
- androstenedione
Enzyme which is responsible for the multiplication of human immuno virus in WBC of host is
- RNA Polymerase
- RNA primase
- Reverse transcriptase
- DNA Polymerase
Which layer is thickest in the wall of heart ?
- Pericardium
- Endocardium
- Epicardium
- Myocardium
Hormone involved in controlling biological rhythms and photoperiodism is
- adrenalin
- aldosterone
- serotonin
- melatonin
Which of the following cells in the testis secrete male sex hormone testosterone?
- Sertoli cells
- Germ cells
- Leydig cells
- Spermatid
The base pair rule was proposed by
- Watson and Crick
- Erwin Chargraff
- Messelson and Stahl
- Hershey and Chase
The polymerase chain reaction
- is a method for sequencing DNA
- is used to transcribe specific genes
- amplifies specific DNA sequences
- does not require DNA replication primers
Which of the following is not a stop codon?
- UAA
- UCA
- UGA
- UAG
The famous Avena curvature test conducted by F.W. Went proves that
- Plant growth regulators are auxins.
- Shoot apex is the site for the synthesis of growth regulating substance.
. - ABA is a growth inhibitor.
- Auxins exercise apical bud dominance.
Regulatory sequences controlling protein-coding genes in prokaryotes are called
- exons
- introns
- operon
- cistron
Broca's area, located in the frontal lobe just front of the primary motor cortex, is essential for
- hearing
- taste
- vision
- speech
Which of the following enzymes is not a protein?
- Pepsin
- Amylase
- Ribozyme
- Sucrase
The units in chromatin called nucleosomes consists of
- DNA only
- Histones only
- DNA wound around a histone core
- RNA wound around a histone core
The most accepted theory about the origin of life is
- Special creation theory
- Cosmozoic theory
- Spontaneous generation theory
- Oparin Haldane theory
The germ layer from which skeleton and muscles are originated is
- ectoderm
- endoderm
- mesoderm
- periderm