Explain what is meant by discontinuous variation and continuous variation
Explain what is meant by discontinuous variation and continuous variation
1 Answer
Questions and Answers For
AS and A Level Biology
202 Questions
1 Answer Explain, with examples, that phenotypic variation is due to genetic factors or environmental factors or a combination of genetic and environmental factors
Explain, with examples, that phenotypic variation is due to genetic factors or environmental factors or a combination of genetic and environmental factors
1 Answer Explain how gibberellin activates genes by causing the breakdown of DELLA protein repressors, which normally inhibit factors that promote transcription
Explain how gibberellin activates genes by causing the breakdown of DELLA protein repressors, which normally inhibit factors that promote transcription
1 Answer State that transcription factors are proteins that bind to DNA and are involved in the control of gene expression in eukaryotes by decreasing or increasing the rate of transcription
State that transcription factors are proteins that bind to DNA and are involved in the control of gene expression in eukaryotes by decreasing or increasing the rate of transcription
1 Answer Explain genetic control of protein production in a prokaryote using the lac operon (knowledge of the role of cAMP is not expected)
Explain genetic control of protein production in a prokaryote using the lac operon (knowledge of the role of cAMP is not expected)
1 Answer Describe the differences between structural genes and regulatory genes and the differences between repressible enzymes and inducible enzymes
Describe the differences between structural genes and regulatory genes and the differences between repressible enzymes and inducible enzymes
1 Answer Explain the role of gibberellin in stem elongation including the role of the dominant allele, Le, that codes for a functional enzyme in the gibberellin synthesis pathway, and the recessive allele, le, that codes for a non-functional enzyme
Explain the role of gibberellin in stem elongation including the role of the dominant allele, Le, that codes for a functional enzyme in the gibberellin synthesis pathway, and the recessive allele, le, that codes for a non-functional enzyme
1 Answer Explain the relationship between genes, proteins and phenotype with respect to the: • TYR gene, tyrosinase and albinism • HBB gene, haemoglobin and sickle cell anaemia • F8 gene, factor VIII and haemophilia • HTT gene, huntingtin and Huntington’s disease
Explain the relationship between genes, proteins and phenotype with respect to the: • TYR gene, tyrosinase and albinism • HBB gene, haemoglobin and sickle cell anaemia • F8 gene, factor VIII and haemophilia • HTT gene, huntingtin and Huntington’s disease
1 Answer Use the chi-squared test to test the significance of differences between observed and expected results (the formula for the chi-squared test will be provided, as shown in the Mathematical requirements)
Use the chi-squared test to test the significance of differences between observed and expected results (the formula for the chi-squared test will be provided, as shown in the Mathematical requirements)
1 Answer Interpret and construct genetic diagrams, including Punnett squares, to explain and predict the results of test crosses
Interpret and construct genetic diagrams, including Punnett squares, to explain and predict the results of test crosses
1 Answer
Welcome to our Q&A page! Here, you can find answers to frequently asked questions about our courses, features, and other topics related to our content. If you have a question that's not covered, feel free to ask, and we'll be happy to help!
Quiz Leaderboard
1st
Sourav
Score: 90%
Questions: 20
2nd
Priyanka
Score: 90%
Questions: 10
3rd
Nischal
Score: 90%
Questions: 10
4th
Vesnce
Score: 45%
Questions: 20
5th
Hector
Score: 40%
Questions: 10
6th
Hykss
Score: 20%
Questions: 10
Top Questions
-
drifting movement in fishes during migration
Drifting movement is a significant aspect of fish migration, particularly
Sourav Pan
-
classification of fishes based on migration in dams in india
Fish migration is a critical aspect of aquatic ecosystems, significantly
Sourav Pan
-
Do fish migrate in the winter?
Fish exhibit diverse migratory behaviors during winter, influenced by species-specific
Sourav Pan
-
Topoisomerase: – A. Separates the DNA strands at the origin – B. Keeps the single-stranded DNA regions from coming back together – C. Re-coils the DNA into a helix after replication is complete – D. Breaks DNA backbone to remove tension produced by the helicase – E. Breaks hydrogen bonds between DNA and the RNA primers
D. Topoisomerase breaks the DNA backbone to relieve supercoiling tension
Sourav Pan
-
What end overhangs?
The 3' end of the telomere strand typically has a
Sourav Pan
-
What kind of cells need cell replication of their telomeres?
Actively dividing cells, such as stem cells, germ cells, and
Sourav Pan
-
What percent of all human cancers have high levels of telomerase?
Around 85–90% of human cancers have high telomerase activity. This
Sourav Pan
- All Questions
BNO Team