Question

13) Oncogenes are _____________

14) Mass extinction can result in adaptive radiations of new species through evolution (T / F)

16) A positively charged atom or molecule is called an anion (T / F)

17) The Light-Dependent step in photosynthesis is also known as the Calvin Cycle (T / F)

19) _________ leads to a +/0 interaction between 2 species

20) Introns are portions of the DNA that codes for a particular protein (T / F)

21) The biotechnology that involves the mixing of genes of different species is called ________ biotechnology

22) If the frequency of 2 alleles in a population is p = 0.8 and q = 0.2, what is the likely genotype frequencies? (Assume H-W equilibrium)

23) Chromosomal mutations that are the result of the molecule moving from one chromosome to another are called ________

24) Modern humans migrated out of Africa about 55000~85000 years ago (T / F)

Answer 1

Ans:

13) Oncogenes are cancer/tumor forming genes.

Explanation: Oncogenes are tumor/ cancer forming genes whose normal cellular counterpart is proto-oncogenes. The gain-of-function mutation of proto-oncogenes lead to oncogene formation.

14) Mass extinction can result in adaptive radiations of new species through evolution -True

Explanation: Mass extinction play important role in evoltuion by giving adaptive radiation through reducing species diversity by killing specific lineages. Adaptive radiation forms different new species whose adaptation allow them to fill different ecological niche.

16) A positively charged atom or molecule is called an anion- False

Explanation: The positively charged atom or molecule is called cation and negatively charged ion is called anion.

17) The Light-Dependent step in photosynthesis is also known as the Calvin Cycle- False

Explanation: The Light-Dependent step in photosynthesis is cyclic and non-cyclic phosphorylation. Calvin Cycle is a light-independent process.

19) Commensalism leads to a +/0 interaction between 2 species.

Explanation: Commensalism is a type of interaction where one species is benifited without harming/inhibiting the another species.

20) Introns are portions of the DNA that codes for a particular protein- False

Explanation: Introns are non-coding sequence does not code for any protein.

21) The biotechnology that involves the mixing of genes of different species is called Recombinant biotechnology

Explanation: Recombinant biotechnology is a techniques where two or more species genes are joined together.

22) If the frequency of 2 alleles (suppose A and a allele) in a population is p = 0.8 and q = 0.2,

The genotype frequencies,

AA = p2 = (0.8)2 = 0.64

Aa = 2pq = 2 × 0.8 × 0.2 = 0.32

aa = q2 = (0.2)2 = 0.04

23) Chromosomal mutations that are the result of the molecule moving from one chromosome to another are called Translocation

Explanation: Translocation is a type of chromosomal mutation where part of chromosome moves from one chromosome to another.

24) Modern humans migrated out of Africa about 55000~85000 years ago - True

Explanation: odern humans migrated out of Africa about 55000~85000 years ago.