Biology

O Level Biology  .....

Biology Info

001) What Is Down Syndrome?
A) About 6,000 babies with Down syndrome are born in the United States each year.
B) In the year 2000, an international team of scientists successfully identified and catalogued each of the approximately 329 genes on chromosome 21. This accomplishment opened the door to great advances in Down syndrome research.
C) There are three types of Down syndrome:  trisomy 21 (nondisjunction), translocation and mosaicism. 

002) Article: Gene Therapy: Revolutionizing Medicine

003) Trivia Quiz on Spinal Cord & Nerves

004) White biotechnology is the branch of biotechnology that is dedicated to the industrial production through biological processes. 

005) PDF Book: Biology matters: Workbook : Link  

006) SlideShare: Chapter 2 Blood Circulation & Transport 

007) Signal Transduction :  transmission of molecular signals from outside the cell into the cell via cell-surface receptors. .... Link  

008) Enzyme Active Site and Substrate Specificity 

009) Living things are classified using a system developed by Carl Linnaeus. Organisms are commonly named by the binomial system of genus and species. 

009-B) According to the binomial system of nomenclature, every organism is designated a scientific name with two parts: Genus is written first and is capitalised (e.g. Homo) Species follows and is written in lower case (e.g. Homo sapiens)

010) food tests: 

Reducing sugar / Benedict’s ....

Starch / Iodine ...

Protein/amino acids / Biuret (a mixture of sodium hydroxide and copper sulfate).... 

Fat / Ethanol ... 

011) Vascular refers to veins and arteries. 

B) Xylem is a type of vascular tissue present in plants, which primarily transports water and nutrients from roots to stem and leaves.

C) The tissues that consist of blood vessels and lymphatic systems are referred to as vascular tissue. The tissues that do not have blood vessels and lymphatic vessels are referred to as avascular tissue. 

D) What is vascular problem?

Vascular disease (vasculopathy) affects the blood vessels that carry oxygen and nutrients throughout your body and remove waste from your tissues. Common vascular problems happen because plaque (made of fat and cholesterol) slows down or blocks blood flow inside your arteries or veins.

012) 

influx: an inflow of water into a river, lake, or the sea.

efflux: the flowing out of a substance or particle. 

013) Absorption and accumulation of nitrate in plants: influence of environmental factors .... Link  

B) [Determination of the accumulation of nitrates in plant tissues] 

014) What type of enzyme is amylase?

Amylases are a class of enzymes that catalyze the hydrolysis of starch into sugars such as glucose and maltose (Sundarram and Murthy, 2014). 

015) What does dysglycemia mean?

Dysglycemia refers to blood sugar levels that go too low or too high. Diabetes is the best-known condition involving dysglycemia. It's a very common disease and one that costs money and lives. 

016) What dyslipidemia means?

Dyslipidemia is the imbalance of lipids such as cholesterol, low-density lipoprotein cholesterol, (LDL-C), triglycerides, and high-density lipoprotein (HDL). This condition can result from diet, tobacco exposure, or genetic and can lead to cardiovascular disease with severe complications.  

B) What dyslipidemia means?

Dyslipidemia is the imbalance of lipids such as cholesterol, low-density lipoprotein cholesterol, (LDL-C), triglycerides, and high-density lipoprotein (HDL). This condition can result from diet, tobacco exposure, or genetic and can lead to cardiovascular disease with severe complications.

017) The physiological significance of salivary amylase is still being uncovered and aspects of it are controversial, .............. Link

 

101) Terms ...

 Messenger RNA , Base pair, Nucleic acid sequence, Transfer RNA, Mature messenger RNA, Nucleic acid, Biopolymer, Biomolecule, Cofactor (biochemistry), Metabolic pathway, eukaryotic cell,  mRNA, phenotype, genotype, genomics, Human Genome Project / HGP, gene therapy, haplotype, alleles, 

 A Level Biology ...

01) Pearson: International A Level answers  

YT Channel: 

01) Dr. Gupta's Neuro Edutech ... @dr.guptasneuroedutech314

 Online Biology Practice 

001) YT: O Level Biology 5090 Paper 1 | May/June 2022 | PAPER 12 | 5090/12/M/J/22 ... PDF 

002) YT: Neuroscience Basics: Human Brain Anatomy and Lateralization of Brain Function, 3D Animation.