Description : The following are true about the DNA in mitochondria: a. they are found in the ovum and not the spermatozoan b. they have their own genome c. they are expressed in muscle cells d. all above
Last Answer : all above
Description : Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature ? (a) They do not need to reproduce (b) They are somatic cells (c) They do not metabolize (d) All their internal space ... (a) (2) (a), (c) and (d) (3) (b) and (c) (4) only (d)
Last Answer : (4) only (d)
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 : $ Seive tubes in plants are formed of enucleated cells called seive members. ! All the activities of a seive cell are controlled by nucleated parenchy
Last Answer : $ Seive tubes in plants are formed of enucleated cells called seive members. ! All the activities of a seive ... wrong D. If both As and R are wrong.
Description : Which of the following part of spermatozoan aries from centriole ?
Last Answer : Which of the following part of spermatozoan aries from centriole ? A. Apical cap B. Head C. Middle piece D. Tail
Description : A matured mammalian cell without nucleus is – (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte
Last Answer : (2) Erythrocyte Explanation: Mammalian erythrocytes are unique among the vertebrates as they are nonnucleated cells in their mature form. These cells have nuclei during early phases of ... lose all other cellular organelles such as their mitochondria, Golgi apparatus and endoplasmic reticulum.
Description : A matured mammalian cell without nucleus is (1) Lymphocyte (2) Erythrocyte (3) Spermatozoan (4) Oocyte
Last Answer : Erythrocyte
Description : . Sickle-cell anaemia is (a) caused by substitution of valine by glutamic acid in the beta globin chain of haemoglobin (b) caused by a change in a single base pair of DNA (c) characterized by elongated sickle like RBCs with a nucleus (d) an autosomal linked dominant trait.
Last Answer : (b) caused by a change in a single base pair of DNA
Description : Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female? (a) Maintenance of the hypertrophical endometrial lining (b) ... the blood stream (c) Retention of well-developed corpus luteum (d) Fertilisation of the ovum
Last Answer : (b) Maintenance of high concentration of sex- hormones in the blood stream
Description : I want to move a mature weeping caragana tree (6' tall); what is the root system like?
Last Answer : It depends on how long that particular tree has been planted in that spot. If it has been there more than 5 years, then you should consider have a professional crew do the moving for you.
Description : Which of the following statements is not true for retroviruses? (a) DNA is not present at any stage in the life cycle of retroviruses. (b) Retroviruses carry gene for RNA-dependent DNA ... mature retroviruses is RNA. (d) Retroviruses are causative agents for certain kinds of cancer in man.
Last Answer : (a) DNA is not present at any stage in the life cycle of retroviruses
Description : Compared to blood our lymph has (a) plasma without proteins (b) more WBCs and no RBCs (c) more RBCs and less WBCs (d) no plasma
Last Answer : b) more WBCs and no RBCs
Description : The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC, because O in it refers to having (a) overdominance of this type on the genes for A and B types (b) one antibody ... on the RBCs (c) no antigens A and B on RBCs (d) other antigens besides A and B on RBCs
Last Answer : (c) no antigens A and B on RBCs
Description : Which one of the following statements about human sperm is correct? (a) Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilisation. (b) The ... a sensory structure leading the sperm towards the ovum. (d) Acrosome serves no particular function
Last Answer : (b) The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilisation.
Description : Name the major site where RBCs are formed. -Biology
Last Answer : answer:
Description : Which is known as ‘graveyard of RBCs’? -General Knowledge
Last Answer : The answer is 'Spleen'
Description : Which organ destroys worn out RBCs in the body of a vertebrate? -Do You Know?
Last Answer : The spleen is in the upper abdomen. It filters pathogens and worn out red blood cells from the blood, and then lymphocytes in the spleen destroy them.
Description : What is the main difference in human and frog RBCs?
Last Answer : What is the main difference in human and frog RBCs? A. Human RBC are non-nuclearted B. ... Human RBC have nucleus D. Human RBC are multinucleated
Description : Read the following statements (A-D) `:-` A. RBCs are the most abundant of all the cells in blood B. A healthy adult man has on an average 5 Billions t
Last Answer : Read the following statements (A-D) `:-` A. RBCs are the most abundant of all the cells in blood B. A healthy ... `:-`` A. Four B. Three C. Two D. One
Description : RBCs are nucleated in
Last Answer : RBCs are nucleated in A. Man B. Rabbit C. Rat D. Frog
Description : Immature RBCs fo mammals have
Last Answer : Immature RBCs fo mammals have A. No nucleus B. Single beaded nucleus C. Many nuclei D. Single nucleus.
Description : Which of the following statement is true about RBCs in humans?
Last Answer : Which of the following statement is true about RBCs in humans? A. They do not carry `CO_(2) ... it is transported in dissolved state in blood plasma.
Description : A healthy adult man has, on an average, _______ (in millions) of RBCs mm-3 of blood.
Last Answer : 5 – 5.5
Description : ATP is ‘wasted’ in Rapoport-Lueberring cycle in RBCs as otherwise it will inhibit (A) Phosphoglucomutase (B) Phosphohexo isomerase (C) Phosphofructo kinase (D) Phosphoenol pyruvate carboxy kinase
Last Answer : C
Description : Which one of the following is not a benefit of saliva – (1) It facilitates swallowing (2) It increases RBCs in the body (3) It keeps the mouth and teeth clean (4) It aids speech by facilitating movements of lips and tongue
Last Answer : (2) It increases RBCs in the body Explanation: Saliva does not increase the number of red blood cells in the body which is a condition of disease called Polycythemia. It results in an increased level of circulating red blood cells in the bloodstream. 674.
Description : What happens to a person who receives the wrong type of blood? (1) All the arteries constrict (2) All the arteries dialates (3) The RBCs agglutinate (4) The spleen and lymphnodes deteriorate
Last Answer : (3) The RBCs agglutinate Explanation: Red blood cell agglutination indicates clumping of RBC's due to cold agglutinins which are most commonly IgM antibodies. These antibodies cross-link red ... tination is when the particles involved are red blood cells. The agglutin is called hemagglutinin..
Description : The virus of AIDS affects the growth of (1) Haemoglobin (2) RBCs in blood (3) T cells in blood (4) Grey cells in brain
Last Answer : (3) T cells in blood Explanation: Human immunodeficiency virus (HIV) attacks and kills crucial immune system cells, known as T-helper cells. A T cell, or T lymphocyte, is a type of ... role in cell-mediated immunity. They are called T cells because they mature in the thymus from thymocytes.
Description : Increased RBC's in the blood leads to a condition called - (1) Anemia (2) Haemophilia (3) Polycythemia (4) Leukaemia
Last Answer : (3) Polycythemia Explanation: Polycythemia is an abnormally high concentration of hemoglobin in the blood through an increase in red cell numbers. People with this condition have thicker blood, which ... in the circulation by increasing or decreasing the rate of production by the bone marrow.
Description : Which of the following is known as 'grave yard' of RBCs? (1) Liver (2) Bone marrow (3) Spleen (4) Appendix
Last Answer : (3) Spleen Explanation: The old, worn out and dead RBC are destroyed mainly in an organ called spleen. Hence, it is commonly called the 'graveyard of RBC'.
Description : RBCs do not perform aerobic respiration because these do not contain - (1) Mitochondria (2) Nucleus (3) Endoplasmic Reticulum (4) Lysosomes
Last Answer : (1) Mitochondria Explanation: Red Blood Corpusles (RBCs) do not contain Mitochondria.
Description : The number of RBCs varies from
Last Answer : 4.5 to 5.5 million cells/cubic mm of blood.
Description : What happens to a person who receives the wrong type of blood? A. All the arteries constrict B. All the arteries dialates C. The RBCs agglutinate (Answer) D. The spleen and lymphnodes deteriorate
Last Answer : C. The RBCs agglutinate (Answer)
Description : The Virus of AIDS affects the growth of-------? A. Hemoglobin B. RBCs in blood C. T cells in blood (Answer) D. Grey Cells in blood
Last Answer : C. T cells in blood (Answer)
Description : Measuring Biochemical Oxygen Demand (BOD) is a method used for (a) estimating the amount of organic matter in sewage water (b) working out the efficiency of oil driven automobile engines ... commercial scale (d) working out the efficiency of RBCs about their capacity to carry oxygen.
Last Answer : (a) estimating the amount of organic matter in sewage water
Description : Measuring Biochemical Oxygen Demand (BOD) is a method used for (a) estimating the amount of organic matter in sewage water (b) working out the efficiency of oil driven automobile engines (c) ... a commercial scale (d) working out the efficiency of RBCs about their capacity to carry oxygen.
Description : People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million. This is because at high altitude ... required amount of O2 to survive (d) there is more UV radiation which enhances RBC production.
Last Answer : (c) atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
Description : People who have migrated from the planes to an area adjoining Rohtang Pass about six months back (a) have more RBCs and their haemoglobin has a lower binding affinity to O2 (b) are not physically fit ... etc. (d) have the usual RBC count but their haemoglobin has very high binding affinity to O2
Last Answer : (a) have more RBCs and their haemoglobin has a lower binding affinity to O2
Description : A person suffering from a disease caused by Plasmodium, experiences recurring chill and fever at the time when (a) the sporozoites released from RBCs are being rapidly killed and broken down ... to enter fresh RBCs (d) the microgametocytes and megagametocytes are being destroyed by the WBCs
Last Answer : (c) the parasite after its rapid multiplication inside RBCs ruptures them, releasing the stage to enter fresh RBCs
Description : Motile zygote of Plasmodium occurs in (a) gut of female Anopheles (b) salivary glands of Anopheles (c) human RBCs (d) human liver
Last Answer : (a) gut of female Anopheles
Description : What percent solution of NaCl is considered isotonic to mammalian RBCs. a. 0.8% b. 0.85% c. 0.90% d. 0.95%
Last Answer : 0.85%
Description : Which one of the following characteristics is common both in humans and adult frogs? (a) Four chambered heart (b) Internal fertilisation (c) Nucleated RBCs (d) Ureotelic mode of excretion
Last Answer : (c) Nucleated RBCs
Description : The lymph serves to (a) return the interstitial fluid to the blood (b) return the WBCs and RBCs to the lymph nodes (c) transport CO2 to the lungs (d) transport O2 to the brain
Last Answer : (a) return the interstitial fluid to the blood
Description : Which of the following is not the main function of lymph glands? (a) Forming RBCs (b) Destroying bacteria (c) Forming WBCs (d) Forming antibodies
Last Answer : a) Forming RBCs
Description : Which of the following statements is true for lymph? (a) WBC + serum (b) Blood – RBCs and some proteins (c) RBCs + WBCs + plasma (d) RBCs + proteins + platelets
Last Answer : (b) Blood – RBCs and some proteins
Description : RBCs do not occur in (a) frog (b) cow (c) camel (d) cockroach.
Last Answer : (d) cockroach.
Description : Carbonic anhydrase occurs in (a) lymphocytes (b) blood plasma (c) RBCs (d) leucocytes.
Last Answer : (c) RBCs
Description : Cells formed in bone marrow include (a) RBCs (b) RBCs and leucocytes (c) leucocytes (d) lymphocytes
Last Answer : b) RBCs and leucocytes
Description : Which one of the following human organs is often called the “graveyard” of RBCs? (a) Gall bladder (b) Kidney (c) Spleen (d) Liver
Last Answer : c) Globulin
Description : Adult human RBCs are enucleate. Which of the following statement(s) is/are most appropriate explanation for this feature? (1) They do not need to reproduce. (2) They are somatic cells. (3) They do not metabolise. (4) All their internal ... Only (1) (b) (1), (3) and (4) (c) (2) and (3) (d) Only (4)
Last Answer : (d) Only (4)