|12th Class Biology Question Answers|
Biology MCQs For Medical Entry Test preparations MCQs
Q.1: Chances for a son or daughter in human birth are ?
- 3:1 between son and daughter
- 1:3 between son and daughter
- 1:1 between son and daughter
- None of them
Q.2: Grasslands present in temperate climates are also called ?
Q.3: When haemoglobin of the blood is fully saturated with oxygen, the 100cc of blood comains ?
- 15cc of oxygen
- 20cc of oxygen
- 25cc of oxygen
- 10cc of oxygen
Q.4: Amphibians wriggle along the belly on the gound with the help of segmentally arranged ?
- Skin patches
- Both a And b
Q.5: Fibroblasts and osteoblasts migrate into the fracture site and begin to construct ?
Q.6: in plants regeneration is the basis of plant ?
Q.7: How many different kinds of the gametes will be formed by an ndividual , who is hetrozygous for four gene pairs ?
Q.8: In succesion lithoseres takes place on ?
- Forest floor
- Bare rocks
Q.9: The individuals have additional sex chromosome in ?
- Klinefelter's syndrome
- Turner's syndrome
- Down's syndrome
- Sach's syndrome
Q.10: A willow 10 centimetres (4 inches) high may have a trunk 7 centimetres (3 inches) in diameter and be 50 years old in ?
Q.11: The perennial plants are bushes or cacti with large shallow root systems in ?
Q.12: Abdomen has a peritoneal cavity lined by a thin epithelium called ?
- Scrotal sac
Q.13: Cystic fibrosis patients lack a gene that codes for trans-membrane carrier of the ?
- Chloride ion
- Sodium ion
- Potassium ion
- Calcium ion
Q.14: Embryo implants in the --------- of the uterus ?
- None of These
Q.15: The corpus luteum is formed at the site of ?
Q.16: From beginning of the 3 month of pregnancy the human embryo is referred to as the ?
Q.17: Adenine and guanine are called ?
- Both a And b
- None of these
Q.18: O blood has neither A or B antigen but it does have ?
- Anti - A antibodies
- Anti - B antibodies
- Anti - O antibodies
- Both a And b
Q.19: PCR takes its name from ?
- RNA polymerase
- DNA polymerase
- DNA ligase
Q.20: With in the ovary , progestetrone is produced by the ?
- Corpus albicans
- Corpus Luteum
- Tertairy follicles
- Primary follicles
Q.21: Each type of the principal type of sensation that we can experience e.g pain touch sight sound and so for this called a modality of ?
Q.22: Two parents, each of blood groups A, have a daughter of blood group O. what is the probality that their next child who has blood gorup O ?
Q.23: The random loss of alleles in a population is called ?
- Gene flow
- Genetic drift
Q.24: Only 30% of the earth is dry land the remainder being covered with ?
Q.25: Between the seminiferous tubules are interstitial cells which secrete ?
Q.26: Gene pool consists of all alleles at all gene loci in all individuals of the ?
Q.27: Antidluretric hormone (ADH) released from posterior pituitary act to actively transport water from filtrate to kidney's ?
Q.28: The process that normally exerts the greatest control over the water balance of an individual is ?
- Kidney function
- Evaporation through the skin
- Respiratory loss
Q.29: In skletal muscle, calcium facilitates contraction by binding to ?
Q.30: Genes are located at specific loci on ?
Q.31: Intelligence is also a case of polygenic inheritance which is strongly influenced by ?
Q.32: Human cells have 46 chromosomes consisting of ?
- 20 pairs
- 21 pairs
- 22 pairs
- 23 pairs
Q.33: is time between the end of mitosis and initiation of DNA synthesis also called as ?
- Pre-DNA synthesis phase
- DNA synthesis phase
- Post-DNA synthesis phase
- None of these
Q.34: The electrical potencial of cell membrane of meuron when it is not transmission any signal is called ---------- ?
- Resting membrane potencial
- Action potencial
- Propagation of impulse
Q.35: As CFC rise to the atmosphere ultraviolet rays release ?
Q.36: Three sets of microtubules (fibres) originate from each pair of ?
Q.37: If the amount of adenine in DNA of a bacterial cell is 36% of the total nitrogenous bases, what will be the amount of guanone in the DNA of a cell in next generations ?
- 14 %
- 28 %
- 36 %
- 64 %
Q.38: Fluid secreted by sertoli cells provides sperms ?
- Liquid medium
- All a,b,and c
Q.39: Blue cone monochromacy is also called ?
- Red - green colour blindness
- Red - blue colour blindness
- Green - blue colour blindness
- Yellow - blue colour blindness
Q.40: Mammals including human maintain their high body temperature within a narrow range of about ?
Q.41: Luteinizing hormone induces ?
Q.42: In eukaryotic mRNA molecule there are 90 nucleotide involved in translation process. What is the number of amino acid in the protein formed by this mRNA molecules ?
- 29 Amino acids
- 30 Amino acids
- 45 Amico acids
- 90 Amino acids
Q.43: Oxygen carryiing capacity of blood does not depend upon ?
- Particle pressure of CO2
- Particle pressure of O2
- Height from sea level
- Quantity of blood