Description : Cellular totipotency was demonstrated by (a) Theodore Schwann (b) A.V. Leeuwenhoek (c) F.C. Steward (d) Robert Hooke.
Last Answer : (c) F.C. Steward
Description : $ Cellular totipotency means that single cell can give rise to a fully grown multicellular organisms ! Meristematic cells are also called "stem cells"
Last Answer : $ Cellular totipotency means that single cell can give rise to a fully grown multicellular organisms ! Meristematic ... D. If both As and R are wrong.
Description : In tissue culture medium, the embryoids formed from pollen grains is due to (a) cellular totipotency (b) organogenesis (c) double fertilization (d) test tube culture.
Last Answer : (a) cellular totipotency
Description : Which of the following plant cells will show totipotency? (a) Sieve tubes (b) Xylem vessels (c) Meristem (d) Cork cells
Last Answer : (c) Meristem
Description : Eukaryotic cells have extensive intracellular membranes, termed the endomembrane system, which divide the cell into structurally and functionally distinct compartments, or organelles. These include the inner cell ... . Name a cellular component whose membrane is not part of the endomembrane system.
Last Answer : Mitochondria; also chloroplasts
Description : Which of the following plants cells with show totipotency ?
Last Answer : Which of the following plants cells with show totipotency ? A. Sieve tubes B. Xylem vessels C. Meristem D. Cork cells
Description : You discover a new species of a plant. You also discover that it produces motile sperms and dominant generation has diploid cells. It belongs to (1) Bryophyte (2) Angiosperm (3) Gymnosperm (4) Pteridophyte
Last Answer : 4) Pteridophyte
Description : Proto-oncogenes are: B A. DNA sequences in cells that are oncogenes themselves B. Cellular copies of genes that were first found in oncogenic retroviruses C. DNA viral sequences that are known to infect human cells D. Bacterial DNA counterparts
Last Answer : Cellular copies of genes that were first found in oncogenic retroviruses
Description : In eubacteria, a cellular component that resembles eukaryotic cell is
Last Answer : In eubacteria, a cellular component that resembles eukaryotic cell is A. Plasma membrane B. Nucleus C. Ribosomes D. Cell wall
Description : In eubacteria, a cellular component that resembles eukaryotic cell is (a) plasma membrane (b) nucleus (c) ribosomes (d) cell wall.
Last Answer : (a) plasma membrane
Description : 8. State a method of cellular defence which works in all eukaryotic organism
Last Answer : Ans- RNA interference
Description : All of the following statements about bacterial promoters are true except (A) They are smaller than eukaryotic promoters (B) They have two consensus sequences upstream from the transcription star site (C) ... is the site for attachment of RNA polymerase (D) TATA box has a high melting temperature
Last Answer : Answer : D
Description : The bacterial cytoskeleton a. transport vesicle b. helps determine cell shape c. Is organized identical to its eukaryotic counterpart. d. Centers the nucleoid.
Last Answer : b. helps determine cell shape
Description : Explain the term totipotency.
Last Answer : Explain the term totipotency.
Description : Define totipotency.
Last Answer : Totipotency is the capacity of a cell to differentiate into a new organism.
Description : A plant bears fruit, has a column of vascular tissue and a tap root system. This plant is a (a) angiosperm and dicot (b) gymnosperm and dicot (c) angiosperm and monocot (d) gymnosperm and monocot.
Last Answer : (a) angiosperm and dicot
Description : 126.Plant group with largest ovule, largest tree and largest gametes is (a) gymnosperm (b) angiosperm (c) bryophyta (d) pteridophyta.
Last Answer : a) gymnosperm
Description : The smallest plant family ‘Gymnosperm’ has how many species? (a) 640 (b) 300 (c) 1000 (d) 900
Last Answer : (d) 900
Description : Interferon (A) Is virus specific (B) Is a bacterial product (C) Is a synthetic antiviral agent (D) Requires expression of cellular genes
Description : The complement system consists of a series of serum proteins that exist in a quiescent or very low-level state of activation in the uninfected host. Which of the following ... certain complement components serve as chemoattractants to additional cellular components of the host defense mechanism
Last Answer : Answer: a, c, d Complement activation can occur through either classic or alternate (properdin) pathways, both of which eventuate in deposition of terminal complement pathway components on the ... and release of lysosomal enzymes that can directly damage certain target tissues, such as the lung
Description : The Hyderabad based Centre for Cellular and Molecular Biology (CCMB) and Indian Institute of Rice Research (IIRR) has developed Improved Samba Masuri (ISM) variety rice with which feature? a. Low Glycemic Index (GI) b. Bacterial Resistance c. High Cholesterol d. Both a and c
Last Answer : d. Both a and c
Description : Which of the following statement(s) is/are true concerning ischemia reperfusion injury? a. During ischemia, ATP degradation results in increased plasma and intracellular levels of ... immunization with antibodies to neutrophil adhesive complex lessen the ischemic/reperfusion microvascular injury
Last Answer : Answer: a, b, c, d During the ischemia and hypoperfusion phase, degradation of ATP stores essential to maintain cell integrity and significant loss of diffusible ... either the neutrophil adhesive complex or the endothelial selectins dramatically lessens ischemia/reperfusion microvascular injury
Description : A level of regulation, demonstrated by the termination of transcription if tryptophan is abundant, by the tryptophan operon in E.coli cells is called A.activation B.attenuation C.corepression D.desiccation
Last Answer : B.attenuation
Description : Assertion:- All eukaryotic cells are not identical. Reason:- Centrioles are found in animal cells, absent in almost all plant cell.
Last Answer : Assertion:- All eukaryotic cells are not identical. Reason:- Centrioles are found in animal cells, absent ... D. If both Assertion & Reason are false.
Description : Do all eukaryotic cells have nucleus and only one nucleus ?
Last Answer : There are eukaryotic cells without nucleus and others with more than one nucleus. Osteoclasts, the cells responsible for resorption of the osseous matrix, for example, are multinucleate cells; ... cells. Cell Nucleus Review - Image Diversity: cell nucleus miltinucleate cells enucleated cells
Description : What is true about ribosomes? (a) The prokaryotic ribosomes are 80S, where “S” stands for sedimentation coefficient. (b) These are composed of ribonucleic acid and proteins. (c) These are found only in eukaryotic cells. (d) These are self-splicing introns of some RNAs
Last Answer : (b) These are composed of ribonucleic acid and proteins.
Description : What is true about ribosomes ? (1) These are self - splicing introns of some RNAs (2) The prokaryotic ribosomes are 80S, where “S” stands for sedimentation coefficient (3) These are composed of ribonucleic acid and proteins (4) These are found only in eukaryotic cells
Last Answer : (3) These are composed of ribonucleic acid and proteins
Description : What does the term gymnosperm mean. -Biology
Last Answer : a plant of a group that comprises those that have seeds unprotected by an ovary or fruit, including the conifers, cycads, and ginkgo.
Description : Where does the zygote of a gymnosperm develop? -Biology
Last Answer : If sperm then travel from the pollen to an egg so fertilization can occur, a diploid zygote results. The zygote develops into an embryo within a seed, which forms from the ovule inside the female cone.
Description : Where do gymnosperm seeds develop -Biology
Last Answer : Gymnosperm seeds develop either on the surface of scales or leaves, which are often modified to form cones, or solitary as in yew, Torreya, Ginkgo. The gymnosperms and angiosperms together compose the spermatophytes or seed plants.
Description : Where is pollen produced in a gymnosperm? -Biology
Last Answer : answer:
Description : Which anticancerous botano-chemical is obtained from a gymnosperm?
Last Answer : Which anticancerous botano-chemical is obtained from a gymnosperm? A. Ephedrine B. Strychnine C. Taxol D. Reserpine
Description : 1. Smallest gymnosperm
Last Answer : Name the following: 1. Smallest gymnosperm 2. The plant known as the ‘Coast red wood of California’.
Description : Is larch an angiosperm or gymnosperm?
Last Answer : Need answer
Description : Is a coconut a angiosperm or a gymnosperm?
Last Answer : it is a gymnosperm
Description : Is papaya a gymnosperm or angiosperm?
Last Answer : Angiosperm
Description : Is a tulip a angiosperm or a gymnosperm?
Description : Is banana plants gymnosperm or angiosperm?
Last Answer : The question you have to answer is the seed contained in a fruit. Although you almost never see them, the banana does contain seeds (though non-fertile). So Angiosperm is the answer.One curiosity of ... ! For K40 decays to Ar40 with the emission of a radiation particle. But continue to enjoy them!
Description : Is a slash pine a gymnosperm or angiosperm?
Last Answer : All pine trees are conifers, which are gymnosperms or "nakedseeds" due to the fact that they reproduce by cones instead of byflowers.
Description : What is the oldest tree (gymnosperm) and how much?
Last Answer : Bristle Cone Pine (Pinus Aristata) found in California, has been estimated to be 4900 years old.
Description : PGA as the first CO2 fixation product was discovered in photosynthesis of (a) bryophyte (b) gymnosperm (c) angiosperm (d) alga.
Last Answer : (d) alga.
Description : Vessels are found in (a) all angiosperms and some gymnosperm (b) most of angiosperms and few gymnosperms (c) all angiosperms, all gymnosperms and some pteridophyta (d) all pteridophyta.
Last Answer : (b) most of angiosperms and few gymnosperms
Description : .The endosperm of gymnosperm is (a) diploid (b) polyploid (c) triploid (d) haploid.
Last Answer : (d) haploid.
Description : Azolla pinnata is a). a fern b). an algae c). a gymnosperm d). an angiosperm
Last Answer : a). a fern
Description : In spite of several angiospermic features Gnetum is a gymnosperm because…. a) polyembryony is a common features b) prothallial cell is present in the male gametophyte c) seed is naked d) stem exhibit anomalous secondary growth
Last Answer : c) seed is naked
Description : Endosperm in gymnosperm is............. a) haploid b)diploid c)triploid d)tetraploid
Last Answer : a) haploid
Description : Why the sporophyte of gymnosperm is heterosporous?
Last Answer : Ans: Sporophyte produces two types of spores like smaller micro spores and larger mega spores so it is heterosporous.