Description : The primary egg membrane of mammalians egg is termed as -
Last Answer : The primary egg membrane of mammalians egg is termed as - A. Chorion B. Corona radiata C. Zona pellucida D. Vitelline membrane
Description : At ovulation , the mammalian egg is covered by a membrane called:
Last Answer : At ovulation , the mammalian egg is covered by a membrane called: A. Chorion B. Zona pellucida C. Corona radiata D. Both 2 and 3
Description : Egg is liberated from ovary in (a) secondary oocyte stage (b) primary oocyte stage (c) oogonial stage (d) mature ovum stage.
Last Answer : (a) secondary oocyte stage
Description : Which of the following pair have haploid structures? (a) Nucellus and antipodal cells (b) Antipodal cells and egg cell (c) Antipodal cells and megaspore mother cell (d) Nucellus and primary endosperm nucleus
Last Answer : (b) Antipodal cells and egg cell
Description : The primary biochemical lesion in homozygote with familial hypercholesterolemia (type IIa) is (A) Loss of feed back inhibition of HMG reductase (B) Loss of apolipoprotein B (C) Increased production of LDL from VLDL (D) Functional deficiency of plasma membrane receptors for LDL
Last Answer : Answer : D
Description : Increasing evidence has implicated gram-negative bacterial lipopolysaccharide (LPS endotoxin) as the portion of the gram-negative bacterial cell membrane responsible for many, if not all the ... host, exerting deleterious effects on the host when excessive amounts reach the systemic circulation
Last Answer : Answer: a, b, d The LPS molecule exerts diverse effects on the mammalian host. Immunologic responses to LPS include nonspecific polyclonal B-cell proliferation, macrophage activation and ... deleterious effects on the host only after large amounts are secreted and reach the systemic circulation
Description : The primary mechanism underlying the resistance of gram-positive organisms to macrolide antibiotics is (a) Methylation of binding sites on the 50S ribosomal subunit (b) Formation of ... ) Formation of drug-inactivating acetyltranferases (e) Decreased drug permeability of the cytoplasmic membrane
Last Answer : Ans: A
Description : e primary mechanism by which general anaesthetics produce their action is: A. Affecting receptor operated ion channels in cerebral neurones B. Blocking voltage sensitive Na+ channels in neuronal ... activity of cerebral neurones D. Blocking production of high energy phosphates in the brain
Last Answer : A. Affecting receptor operated ion channels in cerebral neurones
Description : The outer most layer of cell wall is (A) Primary wall (B) Secondary wall (C) Middle lamella (D) Plasma membrane
Last Answer : (C) Middle lamella